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PHP - Caching Json Response
Hello, I am needing to cache a json response from an API so I am not making requests on each load. I have come across some code that is suppose to accomplish this but, it seems to not be working and can't figure out as to why. I created the cache file with 777 but it doesn't write or read from that file when I echo out the results.
The code below is just what is suppose to get the contents and cache it. At the end I tried to print it so I can test it to see it prints the response from the cache file but, nothing and the cache file does exists.
This is the first time I have tried something like this so please be gentle.
// cachePath is name of the path and file used to store cached current conditions gathered from the API request
$cachePath = "./cache/nowcast-cache.txt";
// URL to the API request
$url = "http://api.wunderground.com/api/XXXXXXXXXXXX/geolookup/conditions/q/TX/mesquite.json";
date_default_timezone_set('America/Chicago');
/**
* Request jobs from API
*
* Split the request into smaller request chunks
* and then consolidate them into a single array to limit the API
* requests.
*/
function api_request()
{
file_put_contents($cachePath,
file_get_contents($url));
}
/**
* API Request Caching
*
* Use server-side caching to store API request's as JSON at a set
* interval, rather than each pageload.
*
* @arg Argument description and usage info
*/
function json_cached_api_results( $cache_file = NULL, $expires = NULL ) {
global $request_type, $purge_cache, $limit_reached, $request_limit;
if( !$cache_file ) $cache_file = dirname(__FILE__) . $cachePath;
if( !$expires) $expires = time() - 2*60*60;
if( !file_exists($cache_file) ) die("Cache file is missing: $cache_file");
// Check that the file is older than the expire time and that it's not empty
if ( filectime($cache_file) < $expires || file_get_contents($cache_file) == '' || $purge_cache && intval($_SESSION['views']) <= $request_limit ) {
// File is too old, refresh cache
$api_results = api_request();
$json_results = json_encode($api_results);
// Remove cache file on error to avoid writing wrong xml
if ( $api_results && $json_results )
file_put_contents($cache_file, $json_results);
else
unlink($cache_file);
} else {
// Check for the number of purge cache requests to avoid abuse
if( intval($_SESSION['views']) >= $request_limit )
$limit_reached = " <span class='error'>Request limit reached ($request_limit). Please try purging the cache later.</span>";
// Fetch cache
$json_results = file_get_contents($cache_file);
$request_type = 'JSON';
}
return json_decode($json_results);
}
print_r($json_results);
Edited by Texan78, 20 December 2014 - 03:51 PM. Similar TutorialsHi
I'm having this issue, when i put an url who must show me records i have blank html page
<?php
error_reporting(E_ALL | E_NOTICE);
ini_set('display_errors', '1');
require_once 'database_connection.php';
$post=array(
'limit'=>(isset($_REQUEST['rows']))?$_REQUEST['rows']:'',
'page'=>(isset($_REQUEST['page']))?$_REQUEST['page']:'',
'orderby'=>(isset($_REQUEST['sidx']))?$_REQUEST['sidx']:'',
'orden'=>(isset($_REQUEST['sord']))?$_REQUEST['sord']:'',
'search'=>(isset($_REQUEST['_search']))?$_REQUEST['_search']:'',
);
$se ="";
if($post['search'] == 'true'){
$b = array();
$search['like']=elements(array('utilizador','email'),$_REQUEST);
foreach($search['like'] as $key => $value){
if($value != false) $b[]="$key like '%$value%'";
}
$search['where']=elements(array('nome','utilizador','email'),$_REQUEST);
foreach($search['where'] as $key => $value){
if($value != false) $b[]="$key = '$value'";
}
$se=" where ".implode(' and ',$b );
}
$query = mysql_query("select count(*) as t from utilizador".$se);
if(!$query)
echo mysql_error();
$count = mysql_result($query,0);
if( $count > 0 && $post['limit'] > 0) {
$total_pages = ceil($count/$post['limit']);
if ($post['page'] > $total_pages) $post['page']=$total_pages;
$post['offset']=$post['limit']*$post['page'] - $post['limit'];
} else {
$total_pages = 0;
$post['page']=0;
$post['offset']=0;
}
$sql = "SELECT idutilizador, nome, utilizador, telefone, email, password FROM utilizador ".$se;
if( !empty($post['orden']) && !empty($post['orderby']))
$sql .= " ORDER BY $post[orderby] $post[orden] ";
if($post['limit'] && $post['offset']) $sql.=" limit $post[offset], $post[limit]";
elseif($post['limit']) $sql .=" limit 0,$post[limit]";
$query = mysql_query($sql);
if(!$query)
echo mysql_error();
$result = array();
$i = 0;
while($row = mysql_fetch_object($query)){
$result[$i]['id']=$row->idutilizador;
$result[$i]['cell']=array($row->idutilizador,$row->nome,$row->utilizador,$row->telefone,$row->email,$row->password);
$i++;
}
$json = new stdClass();
$json->rows=$result;
$json->total=$total_pages;
$json->page=$post['page'];
$json->records=$count;
echo json_encode($json);
function elements($items, $array, $default = FALSE)
{
$return = array();
if ( ! is_array($items)){
$items = array($items);
}
foreach ($items as $item){
if (isset($array[$item])){
$return[$item] = $array[$item];
}else{
$return[$item] = $default;
}
}
return $return;
}
?>
*Update
It works if i put
$result[$i]['cell']=array($row->idutilizador,$row->telefone,$row->email,$row->password);So i'm think it's because in $nome(ex: Luis Miguel) and $utlizador(ex Susana Maria) don't accept this (space between words) it is correct? Edited by alphasil, 19 January 2015 - 08:54 AM. Hi,
I'm getting the following response using:
$json_object = json_decode($unparsed_json, true);
array(1) {
["google.com"]=>
array(2) {
["status"]=>
string(16) "regthroughothers"
["classkey"]=>
string(6) "domcno"
}
}
How do I echo the attribute of the ['status']? I have tried using:
echo $json_object->['status'];Thanks, MoFish Hi- I have to post to a URL, grab one field our of the JSON output/response and format nicely to the user. I've tried a few things with some help but none seem to be working. So any help or direction would be greatly appreciate it!! Attempt 1 (works but not formatted nicely) if I post using the browser, it works. the data is sent to the URL (web service) and I can see in the web service logs that the entry has been recorded. the problem is that since i have the URL in "action", i'm taken to that page and the user gets to see the JSON output Code: [Select] //here's the HTML form in offer.php <form action="http://somewebservice.com/<?php echo $PrizeID;?>" method="post" name="myform"> <input name="account" id="account" type="hidden" value="<?php echo $account;?>"/> <input name="dob" id="dob" type="hidden" value="<?php echo $dob;?>"/> <input name="site" id="site" type="hidden" value="<?php echo $site;?>"/> <input id="submit" type="submit" value="submit"/> </form> //here's the output (JSON) after clicking submit {"Prize":"XXXXXX","ConfirmationCode":"######","Error":false,"ErrorMsg":null} Attempt 2 (doens't work) i tried using php but after submit, the page refreshes and no entry is recorded in the web service log Code: [Select] //here's the HTML form in offer.php <form name="myform"> <input name="account" id="account" type="hidden" value="<?php echo $account;?>"/> <input name="dob" id="dob" type="hidden" value="<?php echo $dob;?>"/> <input name="site" id="site" type="hidden" value="<?php echo $site;?>"/> <input id="submit" type="submit" value="submit"/> //here's the php in offer.php <?php if(isset($_POST['submit'])){ $options = array( 'http'=>array( 'method'=>"POST", 'content'=>http_build_query(array( 'account' => $account, 'dob' => $dob, 'site' => $site )) )); $context = stream_context_create($options); $result = file_get_contents("http://somewebservice.com/{$PrizeID}",NULL,$context); var_dump($result); } ?> Last attempt (doesn't work) i tried using php & curl so that i can process in the back and show only the ConfirmationCode to the user in a nice format but it doesn't work. after submit, i'm taken to process.php where i see nothing and no entry is recorded in the web service log Code: [Select] //here's the HTML form in offer.php <form action="process.php" method="post" name="myform"> <input name="account" id="account" type="hidden" value="<?php echo $account;?>"/> <input name="dob" id="dob" type="hidden" value="<?php echo $dob;?>"/> <input name="site" id="site" type="hidden" value="<?php echo $site;?>"/> <input id="submit" type="submit" value="submit"/> </form> //here's the PHP in process.php <?php $postvars=file_get_contents("php://input"); $curl=curl_init("http://somewebservice.com/{$PrizeID}"); curl_setopt($curl,CURLOPT_POSTFIELDS,$postvars); curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); $result=curl_exec($curl); $decodedresult=json_decode($result,true); ?> i haven't gotten to the point where i grab the ConfirmationCode I want because i want to get this fixed first and also because i can't get that to work but will focus on that once i fix this. Thanks. Evening everyone and Merry X-Mas (Happy Holidays) or whatever fits you best.... I have been trying over and over for about 12 hours to figure out how to get data from a specific JSON response and assign the specific values to a new array key/value pair. The various ways I have tried to figure this out are numerous so i'm going to avoid the runnig list of "I trieid this...and this...and this... etc etc." just understand I have reached a dead end point where I need help badly.
Here is what our end goal is:
"The company" is a "service industry" provider (plumbing, electrical etc. etc.) who wants to dispatch its technicians to new jobs based on which technician has the shortest travel time from any existing address where they already have a scheduled appointment that day and has available time in there schedule. Thus the dispatching system when a new service call is entered is going to give "recommended" technicians (up to 4) to be assigned the new service call based on the above mentioned criteria. (Efficient routing to save company gas cost)
1.) We have a "New service" street address assigned to the $to variable: $to = "4813 River Basin Dr S, Jacksonville FL 32207"; 2.) We will have "records" array which containes a series of records, each record consists of a ticket# a technician id# and a street address: $records = array( array("DV1012","30453423","9890 Hutchinson Park Dr Jacksonville, FL 32225"), array("DB3434","30404041","821 Orange Ave Crescent City, FL 32112"), array("DB3434","30605060","1972 Wells Road, Orange Park FL 32073"), array("DB4578","30605060","2 Independent Drive, Jacksonville FL 32202"), array("DB7841","30605060","5000 Norwood Avenue, Jacksonville FL 32208"), array("DB3235","30605060","9501 Arlington Expressway, Jacksonville FL 32225"), array("DB7894","30605060","Massey Avenue, Jacksonville, FL 32227"), array("DB2020","30121212","11200 Central Pkwy Jacksonville, FL 32224") ); 3.) We are going to prepare the records array for submission to Google's Distance Matrix API by URL encoding each array value into a single variable and then submit it: foreach ($records as $key => $value) {$from = $from.urlencode($value[2])."|";} $to = urlencode($to); $data = file_get_contents("//maps.googleapis.com/maps/api/distancematrix/json?origins=$from&destinations=$to&language=en-EN&units=imperial&mode=driving&sensor=false"); $res=json_decode($data) or die("Error: Cannot read object"); You may look at the ACTUAL live Google response from this he http://tiny.cc/i6eerx (We have applied <pre> and var_dump($res) to the output) We are looking to get the following information back: The distance and travel time between the "New Service" address ($to) and each of the address' in the $records array ($from), now once that information is returned from Google (JSON response) we need to parse the response and narrow it down to 4 or less (Based on the 4 lowest drive times) to form a new array which ends like this: $results = array( array("DV1012","30453423","2.3 Miles","8 mins"), array("DB3434","30404041","2.8 Miles","9 mins"), array("DB3434","30605060","4.6 Miles","13.8 mins"), array("DB4578","30605060","5.7 Miles","15.2 min") ); OUR PROBLEM: Everything up until the the Google API response is fine, but iterating over the multidimensional arrays within multidimensional arrays of the JSON response is just not coming together in my head (or 2 dozen code attempts). I am able to ECHO an individual value like ( echo $res->rows[0]->elements[0]->distance->text; ) but this has no value for the end result i need to get to. My last thoughts and efforts was that that I was going to have to embed foreach statements within foreach statements to drill down through the various arrays but that hasn't worked very well and it seems like it shouldn't be how it has to be done. I would appreciate any help in showing me how the iteration code should be written and any explanation about the code so i can wrap my head around it. I got a response from an api in json. How do i echo out the account_name in string. Thanks as usual. The response is below...
{ "status": true, "message": "Account number resolved", "data": { "account_number": "2067483918", "account_name": "BABALOLA MAYOWA ABEL", "bank_id": 18 } }
"status": true, "message": "Account number resolved", "data": { "account_number": "2067483918", "account_name": "BABALOLA MAYOWA ABEL", "bank_id": 18 } }
I want to print data from response json? I was debug with firebug and show this :
{"umumu":"","levelu":1,"nameu":""}
How to echo data array just levelu. But i don't know how to make it?
thanks
Hello.
I am new here.
I have a sligh problem, i saw a few results here which however did not lead to the desired result.
The problem is , i have this Json Response from a API:
Array
(
[0] => Array
(
[isoid] => 0
[omschrijving] => - leeg -
)
[1] => Array
(
[isoid] => 64
[omschrijving] => ArchLinux 2013.5
)
[2] => Array
(
[isoid] => 75
[omschrijving] => AsteriskNOW 3.0.0 64b
)
[3] => Array
(
[isoid] => 67
[omschrijving] => CentOS 5.9 32b
)
[4] => Array
(
[isoid] => 2
[omschrijving] => CentOS 6.3 64b
)
[5] => Array
(
[isoid] => 96
[omschrijving] => CentOS 7.0 64b
)
[6] => Array
(
[isoid] => 4
[omschrijving] => Clear OS 5.2 64b
)
[7] => Array
(
[isoid] => 93
[omschrijving] => CloudLinux 6.4
)
[8] => Array
(
[isoid] => 1
[omschrijving] => Debian GNU/Linux 6.0 / Squeeze 64b
)
[9] => Array
(
[isoid] => 79
[omschrijving] => Debian GNU/Linux 7.0 / Wheezy 32b
)
[10] => Array
(
[isoid] => 71
[omschrijving] => Debian GNU/Linux 7.0 / Wheezy 64b
)
[11] => Array
(
[isoid] => 63
[omschrijving] => Fedora 18 64b
)
[12] => Array
(
[isoid] => 82
[omschrijving] => FreeBSD 10 64b
)
[13] => Array
(
[isoid] => 77
[omschrijving] => FreeBSD 9.2 64b
)
[14] => Array
(
[isoid] => 10
[omschrijving] => FreePBX 5.211.65-12
)
[15] => Array
(
[isoid] => 76
[omschrijving] => GParted Live CD
)
[16] => Array
(
[isoid] => 3
[omschrijving] => KVM Virtio drivers voor Windows
)
[17] => Array
(
[isoid] => 66
[omschrijving] => MailCleaner 2012v6 64b
)
[18] => Array
(
[isoid] => 68
[omschrijving] => Manjaro KDE 0.8.6 64b
)
[19] => Array
(
[isoid] => 78
[omschrijving] => Microsoft Windows 7 Pro 64b
)
[20] => Array
(
[isoid] => 69
[omschrijving] => Microsoft Windows Server 2003 EN
)
[21] => Array
(
[isoid] => 8
[omschrijving] => Microsoft Windows Server 2008R2 EN
)
[22] => Array
(
[isoid] => 7
[omschrijving] => Microsoft Windows Server 2008R2 NL
)
[23] => Array
(
[isoid] => 70
[omschrijving] => Microsoft Windows Server 2012 NL 64b
)
[24] => Array
(
[isoid] => 84
[omschrijving] => Microsoft Windows Server 2012R2 NL
)
[25] => Array
(
[isoid] => 83
[omschrijving] => NOC PS 1.0r11
)
[26] => Array
(
[isoid] => 11
[omschrijving] => OpenBSD 5.2
)
[27] => Array
(
[isoid] => 80
[omschrijving] => OpenBSD 5.4
)
[28] => Array
(
[isoid] => 94
[omschrijving] => OpenBSD 5.5 64b
)
[29] => Array
(
[isoid] => 72
[omschrijving] => OpenSUSE 12.3 64b
)
[30] => Array
(
[isoid] => 95
[omschrijving] => Slackware 13.37
)
[31] => Array
(
[isoid] => 12
[omschrijving] => System Rescue CD
)
[32] => Array
(
[isoid] => 18
[omschrijving] => Turnkey Appflower
)
[33] => Array
(
[isoid] => 19
[omschrijving] => Turnkey ASP.net/Apache
)
[34] => Array
(
[isoid] => 20
[omschrijving] => Turnkey Bugzilla
)
[35] => Array
(
[isoid] => 21
[omschrijving] => Turnkey CodeIgniter
)
[36] => Array
(
[isoid] => 22
[omschrijving] => Turnkey Django
)
[37] => Array
(
[isoid] => 23
[omschrijving] => Turnkey Dokuwiki
)
[38] => Array
(
[isoid] => 24
[omschrijving] => Turnkey DomainControler
)
[39] => Array
(
[isoid] => 25
[omschrijving] => Turnkey Drupal7
)
[40] => Array
(
[isoid] => 26
[omschrijving] => Turnkey Fileserver
)
[41] => Array
(
[isoid] => 27
[omschrijving] => Turnkey Gallery
)
[42] => Array
(
[isoid] => 28
[omschrijving] => Turnkey Gitlab
)
[43] => Array
(
[isoid] => 15
[omschrijving] => Turnkey Google AppEngine Go
)
[44] => Array
(
[isoid] => 16
[omschrijving] => Turnkey Google AppEngine Java
)
[45] => Array
(
[isoid] => 17
[omschrijving] => Turnkey Google AppEngine Python
)
[46] => Array
(
[isoid] => 29
[omschrijving] => Turnkey IceScrum
)
[47] => Array
(
[isoid] => 30
[omschrijving] => Turnkey Joomla2.5
)
[48] => Array
(
[isoid] => 31
[omschrijving] => Turnkey LAMP
)
[49] => Array
(
[isoid] => 32
[omschrijving] => Turnkey Lighttpd/PHP/FastCGI
)
[50] => Array
(
[isoid] => 33
[omschrijving] => Turnkey Magento
)
[51] => Array
(
[isoid] => 34
[omschrijving] => Turnkey Mediawiki
)
[52] => Array
(
[isoid] => 35
[omschrijving] => Turnkey MongoDB
)
[53] => Array
(
[isoid] => 36
[omschrijving] => Turnkey MySQL
)
[54] => Array
(
[isoid] => 37
[omschrijving] => Turnkey NGINX/PHP/FastCGI
)
[55] => Array
(
[isoid] => 38
[omschrijving] => Turnkey OpenLDAP
)
[56] => Array
(
[isoid] => 39
[omschrijving] => Turnkey OpenPhoto
)
[57] => Array
(
[isoid] => 40
[omschrijving] => Turnkey OSCommerce
)
[58] => Array
(
[isoid] => 41
[omschrijving] => Turnkey OTRS
)
[59] => Array
(
[isoid] => 42
[omschrijving] => Turnkey Owncloud
)
[60] => Array
(
[isoid] => 43
[omschrijving] => Turnkey PHPBB
)
[61] => Array
(
[isoid] => 44
[omschrijving] => Turnkey PHPList
)
[62] => Array
(
[isoid] => 45
[omschrijving] => Turnkey PHPNuke
)
[63] => Array
(
[isoid] => 46
[omschrijving] => Turnkey Postgresql
)
[64] => Array
(
[isoid] => 47
[omschrijving] => Turnkey Prestashop
)
[65] => Array
(
[isoid] => 48
[omschrijving] => Turnkey Rails
)
[66] => Array
(
[isoid] => 49
[omschrijving] => Turnkey Redmine
)
[67] => Array
(
[isoid] => 50
[omschrijving] => Turnkey SiTracker
)
[68] => Array
(
[isoid] => 51
[omschrijving] => Turnkey StatusNET
)
[69] => Array
(
[isoid] => 52
[omschrijving] => Turnkey SugarCRM
)
[70] => Array
(
[isoid] => 53
[omschrijving] => Turnkey Symfony
)
[71] => Array
(
[isoid] => 54
[omschrijving] => Turnkey Tomcat
)
[72] => Array
(
[isoid] => 55
[omschrijving] => Turnkey Tomcat/Apache
)
[73] => Array
(
[isoid] => 56
[omschrijving] => Turnkey TRAC
)
[74] => Array
(
[isoid] => 57
[omschrijving] => Turnkey TWiki
)
[75] => Array
(
[isoid] => 58
[omschrijving] => Turnkey Typo3
)
[76] => Array
(
[isoid] => 59
[omschrijving] => Turnkey Wordpress
)
[77] => Array
(
[isoid] => 60
[omschrijving] => Turnkey Zencart
)
[78] => Array
(
[isoid] => 13
[omschrijving] => Ubuntu 10.04 32b
)
[79] => Array
(
[isoid] => 6
[omschrijving] => Ubuntu 10.04 64b
)
[80] => Array
(
[isoid] => 14
[omschrijving] => Ubuntu 12.04 32b
)
[81] => Array
(
[isoid] => 61
[omschrijving] => Ubuntu 12.04 64b
)
[82] => Array
(
[isoid] => 62
[omschrijving] => Ubuntu 12.10 64b
)
[83] => Array
(
[isoid] => 89
[omschrijving] => Ubuntu 14.04 LTS 64b
)
[84] => Array
(
[isoid] => 5
[omschrijving] => Windows Password Reset
)
[85] => Array
(
[isoid] => 81
[omschrijving] => Zen Loadbalancer 3.03
)
[86] => Array
(
[isoid] => 74
[omschrijving] => Zentyal 3.2
)
)
how would i go to fill it automatically in a option value like
<option value='74'>Zentyal 3.2</option>Thank you in advance A HTTP request is made to the server, Slim creates a Request and Response object, content in the Request is sent to another server using cURL via Guzzle, Guzzle returns its own Response, and content from Guzzle's response must be returned by the original Slim response. Would you recommend white-listing or black-listing response headers, and which specific headers? Similarly, would you recommend white-listing or black-listing the request headers sent via cURL, and which specific headers? Thanks
<?php
use Psr\Http\Message\ResponseInterface as Response;
use GuzzleHttp\Psr7\Response as CurlResponse;
class ApiResponder
{
public function delete(Response $httpResponse, CurlResponse $curlResponse) {
return $this->proxy($httpResponse, $curlResponse);
}
//other public methods...
private function proxy(Response $httpResponse, CurlResponse $curlResponse) {
foreach($this->getResponseHeaders($curlResponse) as $name=>$value) {
$httpResponse=$httpResponse->withHeader($name, $value);
}
return $httpResponse->withBody($curlResponse->getBody())->withStatus($curlResponse->getStatusCode());
}
private function getResponseHeaders(Response $httpResponse):array
{
//Blacklist headers which should be returned to original client. TBD whether I should whitelist headers instead.
$blacklist=['Date'=>null, 'Server'=>null, 'X-Powered-By'=>null, 'Access-Control-Allow-Origin'=>null, 'Access-Control-Allow-Methods'=>null, 'Access-Control-Allow-Headers'=>null, 'Set-Cookie'=>null];
return array_diff_key($curlResponse->getHeaders(), $blacklist);
}
/**
* This method doesn't really exist in this class, but is just included to show which headers I am forwarding in the cURL request.
*/
private function getRequestHeaders($clientRequest):array
{
$whitelist=['connection'=>null,'accept'=>null,'accept-encoding'=>null,'accept-language'=>null,'content-type'=>null,'content-length'=>null];
return array_intersect_key($clientRequest->getHeaders(), $whitelist);
}
}
Hi! I was little confused and i am not able to figure out how can i use caching server side and client side. How to use the caching using php. Hello, I just had a quick question about caching when the compiler compiles php into assembly (or however this works with php). Anyways, is there any efficiency in doing this: $holder = strlen($anArray); for (i=0 to 100) echo $holder; Rather than this: for (i=0 to 100) echo strlen($anArray); ? If PHP is smart, then strlen($anArray) would be called once, and any subsequent calls to strlen($anArray) would just call a value stored in a cache. Is this how PHP works? What I have, is a php page that runs over 60 query's a visit, and has over 2000 visits a day. That thousands of query's, and I'm sure this can be simplified easily to lessen the load. I only need to update the data on the page every 12 hours. So, what I'm thinking, is that it would be best to run the query based on time()(every 12 hours), and store that data in a .txt file. Then, the php file, instead of requesting the query over and over, it just extracts the data from the text file. Does this help me at all, or is it useless? is there a better method? Thanks! let's say I have 100,000 users on my forum i want to cache there PROFILE INFO (About me) in .php files which is easy/etc but would that be more space than 100k rows in a db table, or 100k .php files? just wondering, prob a stupid question but atm I cache some lottery info and some other stuff, but that's only 1 .php it would be dumb to cache info and have 100k .php's for each user ID right? or maybe story it all in 1 .php? would be a HUGE Filesize? rather just keep the data in MYSQL right? Hi, just started experimenting with file caching after reading this article: http://www.rooftopsolutions.nl/blog/107 Aside from when dealing with data which changes frequently, I was wondering if it's ever inappropriate to cache your queries. For example, I have a page with a ridiculous number of queries, some of them have a resulting set which is not nearly as large as others. Page performance increased, just not to the level I had been expecting and I wondering if having Apache read each of these files for data is in fact faster than running a number of queries with only some data being cached. Hi I have a php script which allows me to upload images to my product page, when I select a image to copy it simply does a Code: [Select] copy(); function, followed by a Code: [Select] header("Location: products.php"); redirect This all works ok, but when the page reload, the image has not changed, if I refresh the page, it seems to load ok. So I think this is a image caching problem. Any ideas on how to solve this? Thanks
<?php
$myData = file_get_contents("");
$myObject = json_decode($myData);
$myObjectMap = $myObject->result;
?>
can i somehow build in that it only request every 5 minutes because if there are many users on the site it request too much? How can you prevent your browser from caching a page? I think that my news feed is being cached and is causing new posts to not be displayed even after a refresh. Eventually, the posts will show up after about 20 refreshes. I know my query is right so I didn't know if there was a way to stop page caching. I don't really know if it is a caching issue though. I'm starting to think I just have some weird bug in my code because sometimes on refresh news feed items get removed then i'll refresh again and some will get added back in then i'll refresh again and they'll all be there. Ever heard of this happening? I am using a cache script, well it writes a array to a file like this: Code: [Select] fwrite($fh, '<?php'."\n\n".'define(\'PUN_LOTTERY_LOADED\', 1);'."\n\n".'$lottery = '.var_export($output2, true).';'."\n\n".'?>'); output2 is Code: [Select] $result2 = $db->query('MY QUERY '); $output2 = array(); while ($cur_donors = $db->fetch_assoc($result2)) $output2[] = $cur_donors; Now, I want to ditch the mysql and I want to use this script with 7 variables that I already have loaded, so I dont need to use the mysql, how do I add my 7 variables to my var_export function instead of using mysql to loop them? This topic has been moved to Other. http://www.phpfreaks.com/forums/index.php?topic=345836.0 I can trying to create a script for caching an XML files. The problem is that this XML file was poorly constructed and I can't do anything about it. XML file: http://www.boj.org.jm/uploads/tbills.xml I would like to have the cached xml file to be restructured like this: Code: [Select] <tbills> <tbill> <title>Announcement</title> <doc>www.boj.org.jm/pdf/tbill_press_release_2010-07-13.doc</doc> <date>Jul 14 2010 12:00am</date> </tbill> <tbill> <title>Results</title> <doc>www.boj.org.jm/pdf/tbill_results_2010-june-23.doc</doc> <date>Jun 23 2010 12:00am</date> </tbill> </tbill> I can find tutorials that works if the source XML data is properly structured, but I can never seem to find one that addresses situations like this. I found this code in a tutorial and tried to edit it to what I would need, but I'm stuck with 2 things. How do I get this to change the structure of the XML when caching How do I use the call script and where do I put it? Caching script (caching.php) Code: [Select] <?php /* * Caching A small PHP class to */ class Caching { var $filePath = ""; var $apiURI = ""; function __construct($filePath, $apiURI) { //check if the file path and api URI are specified, if not: break out of construct. if (strlen($filePath) > 0 && strlen($apiURI) > 0) { //set the local file path and api path $this->filePath = $filePath; $this->apiURI = $apiURI; //does the file need to be updated? if ($this->checkForRenewal()) { //get the data you need $xml = $this->getExternalInfo(); //save the data to your file $this->stripAndSaveFile($xml); } else { //no need to update the file return true; } } else { echo "No file path and / or api URI specified."; return false; } } function checkForRenewal() { //set the caching time (in seconds) $cachetime = (60 * 60 * 24); //one day worth of seconds //get the file time $filetimemod = filemtime($this->filePath) + $cachetime; //if the renewal date is smaller than now, return true; else false (no need for update) if ($filetimemod < time()) { return true; } else { return false; } } function getExternalInfo() { if ($xml = @simplexml_load_file($this->apiURI)) { return $xml; } else { return false; } } function stripAndSaveFile($xml) { //put the artists in an array $tbill = $xml->TBILLS->ANNOUCE; //building the xml object for SimpleXML $output = new SimpleXMLElement("<tbill><title></title></tbill>"); //get only the top 10 for ($i = 0; $i < 10; $i++) { //create a new artist $insert = $output->addChild("artist"); //insert name and playcount childs to the artist $insert->addChild("name", $artists[$i]->name); $insert->addChild("playcount", $artists[$i]->playcount); } //save the xml in the cache file_put_contents($this->filePath, $output->asXML()); } } ?> Calling script (calling.php) Code: [Select] <?php ini_set('display_errors', 1); error_reporting(E_ALL); include('caching.php'); $caching = new Caching($_SERVER['DOCUMENT_ROOT']."/tbills.xml", "http://www.boj.org.jm/uploads/tbills.xml"); ?> Thanks in advance. Best Regards, _________ Winchester Hi I just have a question about the caching code below.
Should the date function be in the filename if I want to cache the file for several days? Or if the date changes will a new file be created and used instead of the the previous cache file. Is that not even used since my if statement checks for the file modification time? Thanks for the help in understanding this.
$cachefile = 'cache/cached/'.$id . date('M-d-Y').'.php';
$cachetime = 172800;
// Check if the cached file is still fresh. If it is, serve it up and exit.
if (file_exists($cachefile) && time() - $cachetime < filemtime($cachefile)) {
include($cachefile);
exit;
}
ob_start();
{HTML TO CACHE}
$fp = fopen($cachefile, 'w');
fwrite($fp, ob_get_contents());
fclose($fp);
// finally send browser output
ob_end_flush();
I basically want to cache a file for 2-3 days.
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