PHP - Question About Associative Arrays Stored In Super Global Array $_session

Hi,

I have this problem I really hope someone can help me with. I have a variable that stores several arrays. The content of the variable is as follows:

Code: [Select]
print_r(array_values($array));

Array (
[0] => Value 0)
[1] => Value 1)
[2] => Value 2)
[3] => Value 3)
)
Array (
[0] => Value 4)
[1] => Value 5)
[2] => Value 6)
[3] => Value 7)
[4] => Value 8)
)
Array (
[0] => Value 9)
[1] => Value 10)
[2] => Value 11)
[3] => Value 12)
[4] => Value 13)
)
Is there a way to join this multiple arrays into a single array? I do not need to keep the Key, as all of the values contains text that I only want to sort with sort();. If I sort it like this, it will only come out as a,b,c,d - a,b,c,d, not a, a, b, b, c, c, d, d and so forth.

The php script that creates this array is as follows:

Code: [Select]
while($row = mysql_fetch_array($run_mysql_query)){;

$models = $row['text_value'];
$attribute1 = $row['attribute1'];
$attribute2 = $row['attribute2'];

$array = explode(',', $models);

foreach($array as &$value) {
    $value = $row['varchar_value'] . " - " . $value . " - " . $attribute1 . " - " . $attribute2;
}

I will appreciate any help!

I already know how to empty individual $_SESSION[""] array elements, but I was wondering how you could empty ALL $_SESSION array elements without having to write out unset ($_SESSION[""]); for each one?

Is it just unset ($_SESSION);?

Sorry if this seems like a stupid question, but I'm just trying to make sure, because I have a lot of $_SESSION variables and am trying to simplify the task of emptying them all.

Hi, i am having trouble retriving data from a 2D array in my php code an was wondering if i should be using a session array instead to keep track of the contents of the array between refreshes of the page.

I am currently working with an array in the form of :

$hosts[][]

// $hosts[$x][0] - the hostname
// $hosts[$x][1] - the ip address
// $hosts[$x][2] - the operating system


However, i seem to loose the ability to read data from this array when the user creates a refresh event (ie clicks a button/hyperlink).

Should i be storing the data in a $_SESSION array, if so what is the correct syntax to use, i have only ever stored single values in $_SESSION variables.

Thanks for reading.

Hello again,

I got a problem with one of my pages that uses MySql. I didn't expect my site to shoot up into the 1000's per hour but it has but has destroyed the loading time of one of my pages.

Below is the function that is super slow!
Code: [Select]
function get_top($timeframe='today', $time=10, $friends=true, $limit=5, $unique=true, $me_only=false){
if($friends===false){$q='';}else{
$q=' AND (username IN ('; // This array can have upto 500 items in it.
global $friend_id_array, $me;$tarray=$friend_id_array; $tarray[]=$me['id'];
$x= implode(',',$tarray);$q.=$x;
$q.= '))';
}
if($me_only){
$q=' AND username = \''.$me['id'].'\' ';
}

if($timeframe=='today'){
$q_timeframe='AND DATE(thedate) = DATE(NOW()) AND YEAR(thedate) = YEAR(NOW())'; // Checking the date could be slow
}else
if($timeframe=='week'){
$q_timeframe='AND WEEK(thedate) = WEEK(NOW()) AND YEAR(thedate) = YEAR(NOW())';
}else
if($timeframe=='month'){
$q_timeframe='AND MONTH(thedate) = MONTH(NOW()) AND YEAR(thedate) = YEAR(NOW())';
}else
if($timeframe=='all'){
$q_timeframe='';
}
if($unique){$q_unique='GROUP BY username';}
$query="SELECT MAX(score) as highscore, username, timeframe, thedate FROM other_click WHERE (timeframe = '$time') $q $q_timeframe $q_unique ORDER BY highscore  DESC LIMIT 0, $limit"; // A very long query
$result=@mysql_query($query)or die(mysql_error());
if(@mysql_num_rows($result)>0){
while($row=@mysql_fetch_array($result)){ // Maybe resorting the array makes it super slow
$id_array[]=$row;
}
return $id_array;}else{return false;}
}
I've commented the lines which I think maybe making this page load slowly.

I also thought the way the page is loaded.
The page is called 6 times per user but with different settings eg, Friends only and only scores added today.

Please help because this is crippling my site.

Thank-you all
Paul

Using:
 $file = fopen("file1.txt", "r") or exit("Unable to open file!");


I have multiple files (file1.txt, file2.txt, etc.) how can I edit this so it just takes ANY file that ends in .txt and opens it?

Good morning!

I've spent hours on this to no avail. My understanding is that unset() only deletes the copy of the variable local to the current scope. But I am getting a very different result. I have the following structure and output. What am I doing wrong?

<?php
first_function();
second_function() {
   for ($count = 0; $count < $max; $count++) {
      $my_array = array[];   //initialize my array, local in this scope but can be called global in nested functions
      print_r($my_array );    //print 1: array should be always empty but is only in empty in FIRST loop.
      third_function();          //fills the array with numbers, see below, nested function declaring a global array
      print_r($my_array );    //print 3 of my_array, should be full of numbers from third_function global changes
      unset($my_array);      //delete my array so I can start with new array in next loop
      print_r($my_array );    //print 4 of my_array, should be unknown variable
      print('End one loop');
   }
}

third_function() {
   global $my_array;   //declare my global variable
   //...fill my now global array with stuff...
   print_r($my_array );  //print 2: should be filled with numbers. And it is.
}
?>

My output amazingly looks something like this

Array()
Array(45,48,38...all my numbers...)
Array()
ERROR: Notice -- Undefined variable: my_array
End one loop
Array(45,48,38...all my SAME numbers again as if array was NOT unset...)
......

The first and second print lines make sense. But shouldn't the third line be the array filled with numbers generated in third_function? The fourth line error makes sense as the variable is unset. But WHAT did I unset? The next time around in the loop, the array contains the SAME numbers from the previous loop and my new numbers simply get appended to the end of the ever growing array. Why?

This should not be that difficult but seems to be driving me crazy. Any help would be greatly appreciated.

alexander

Hi there,

Basic question, but I can't seem to find a page in the PHP docs that answers (though I'm sure such a one exists, I just can't seem to think up the right search terms - anyway)

My question is: is there a short-hand way to use a value from an associative array as the key in another associative array?

So for example, given this array:

$the_array = array(0 => array('name': 'the_name', 'value' : 'the_value'), 1 => etc....);

then this kind of foreach loop doesn't work

Code: [Select]
$new_data = array();
foreach($the_array as $element){
$new_data[$element['name']] = $element['value'];
}

Obviously I can just save out the values, like $name = $element['name'] --- but I was just wondering if there was a more efficient way to do it?

Cheers,

PS. I tried encapsulating with {} - i.e. $new_data[{$element['name']}] --- but that also fails.

I have a associative array and I need to compare it to a normal array.

Code: [Select]
associative will have anywhere from 2-8 of these
['name']
['color']
['uid']

Code: [Select]
normal array will have anywhere from 1-8 names
['name']

What I need to do is get the name of the people that are in the associative array that are not in the normal array.

I've tried all sorts of different loops and what not and I cant seam to get anything to work in every case.

Hello,
I am not sure if you can help me or if this is the place but...
I am running linux and php5.3.6
I am having problems that I did not experience on my Windows box and it has to do with arrays

if ($answer['correct']) {           
(which contains 1 or 0) is throwing Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING
removing the quotes works but just curious why it is not working and if there is a setting i can change

Also
$answers[] = $answer[id];
is throwing  Parse error: syntax error, unexpected ']', expecting T_STRING or T_VARIABLE or T_NUM_STRING

Thank you to anyone who might be able to help.

Hi guys.

I have an associative array called $VisitorCountryID

$VisitorCountryID = filter_countries(array('Country' => $_SESSION['UserCountryName'])); 

and the function filter_countries() returns all the information relating to the visitors country from the database.

To find out what we have in the array, we do:

print_r($VisitorCountryID); 

and it gives us:

Array ( [14] => Array ( [CountryId] => 14 [Country] => Australia [FIPS104] => AS [ISO2] => AU [ISO3] => AUS [ISON] => 36 [Internet] => AU [Capital] => Canberra [Comment] => ISO includes Ashmore and Cartier Islands,Coral Sea Islands [sortOrder] => 1 ) ) 

Which is OK. Now i just want the CountryId which you can see in the array is 14 therefore I write:

 print_r($VisitorCountryID['CountryId']);

Which should give me 14 but it return blank no output.

I am surprised. What do you think is missing here.

Any response / feedback always welcomed!

Cheers!

I WANT HELP WITH ASSOCIATIVE ARRAY THERE IS ARRAY LIKE THIS

$ARRAY= array(

'dd'=>1,
'dde'=>233,
'qww'=2231
)
i want to store this array in database which data type i should i use want to use mixed data mixed string-numeric type which data type is suitable and i want to print  indexes only but values only what should i do

Hello all!!

I need help with an associative array I've been working on. I'm not sure if I should have typed the weekday in the index because I'm supposed to use the getdate() function to pull the day of the week into the array. I'm also supposed to use string functions to pull apart the value where it's connected with the colon ":". I've tried using explode() and strtok but I don't quite understand how they work...just like the getdate()..I don't understand. Thanks for any 'nudge' in the right direction you can offer.

Code: [Select]
<?php
$title = "Associative Array";
$heading = "Daily Specials";


$specials = array(
"Sunday" =>"52in Flat Screen TV:425.00",
"Monday" =>"Amplifier:145.00",
"Tuesday" =>"HP Computer:355.00",
"Wednesday" =>"500GB External Harddrive:99.00",
"Thursday" =>"Internal Speakers:55.00",
"Friday" =>"Ergonomic Keyboard:85.00",
"Saturday" =>"Wacom Tablet:175.00",
);


echo "<html>
<head>
<title>
$title
</title>
</head>
<body>
   <h1>
  $heading
   </h1>
   <pre>\n";
//prints left and right aligned headers with 30 spaces
printf ("%-30s%30s\n", "Items", "Price"); 
printf ("%'-60s\n", "");
foreach ($specials as $key=>$value);
{
//prints the key left aligned and the value right aligned 
//formats to two decimals spaces
printf ("%-20s%20.2f\n", $key, $value);

echo "     </pre>\n"; 
$delimeter=":";
$inventory=strtok($inventory,$delimeter);
   while(is_string($inventory))
   {
if($inventory)
   {
echo "      $inventory\n";
   }
   $inventory=strtok($delimiter);
   }  
$inventory=explode($delimeter,$inventory);
foreach ($items as $item=>$price)
   {
   echo"     $item, $price\n";
   }
echo "     </pre>\n"; 
  "</body>
      </html>\n";
?>

Hi guys,
I'm really struggling trying toremove duplicates from an associative array. I've tried array_unique but it doesn't work.
Can you point me in the right direction please?

I'm populating my array using the following code
Code: [Select]
foreach($category['manufacturers'] as $manufacturer) {
  list($name, $id) = explode("|", $manufacturer);
  $brands[] = array("id" => $id, "name" => $name);
}

If the array contains:

id = 1, name = brandA
id = 2, name = brandB
id = 1, name = brandA

I'd like to remove either the first or third entry.

I always struggle with associative arrays 

Hello

I have been taking a look at associative arrays.
I 'sort' of get the key/value idea, but I'm not quite sure if they appropriate for use with 3 items (as opposed to the 2 key/value items.)

In the code below, I can incorporate the 'company' and 'table' values - but I'm not sure how to add the 'id' value (from the query).

I would very much appreciate some guidance here.

Thank you.

Code: [Select]
$a = array(); // 'A' table array
$b = array(); // 'B' table array
$c = array(); // 'C' table array

$query = "SELECT id, company, `table` FROM EXHIBITORS WHERE year = $year ORDER BY company ASC";
$result = mysql_query($query) or die("There was a problem with the SQL query: " . mysql_error());

if (mysql_num_rows($result) > 0) {

while($row = mysql_fetch_array($result)) {

$testCol = substr($row['table'], 0, 1);

if ($testCol == 'A') { $a[$row['company']] = $row['table']; }
else if ($testCol == 'B') { $b[$row['company']] = $row['table']; }
else if ($testCol == 'C') { $c[$row['company']] = $row['table']; }
}

echo "<table>";
foreach($a as $key => $value){ echo "<tr><td>company: $key</td><td>Table: $value </td></tr>"; }
echo "</table>";

echo "<table>";
foreach($b as $key => $value){ echo "<tr><td>company: $key</td><td'>Table: $value </td></tr>"; }
echo "</table>";

echo "<table>";
foreach($c as $key => $value){ echo "<tr>"<td>company: $key</td><td>Table: $value </td></tr>"; }
echo "</table>";

}

else { echo "No Exhibitor data for the year $_POST[selectByYear]"; }

I'm scraping a housing website with html source:
Code: [Select]
         <tr><td>&nbsp;</td><td> Bedrooms       </td><td>&nbsp;</td><td >3</td><td>&nbsp;</td></tr>
         <tr><td>&nbsp;</td><td> Full Baths     </td><td>&nbsp;</td><td >1</td><td>&nbsp;</td></tr>
         <tr><td>&nbsp;</td><td> Partial Baths  </td><td>&nbsp;</td><td >1</td><td>&nbsp;</td></tr>
         <tr><td>&nbsp;</td><td> Interior Sq Ft </td><td>&nbsp;</td><td >1,356</td><td>&nbsp;</td></tr>
         <tr><td>&nbsp;</td><td> Acres          </td><td>&nbsp;</td><td >0.16</td><td>&nbsp;</td></tr>
What i'm trying to do is create an associative array with only the details I  want from the above. I've already got a function that steps through the HTML and creates an array element for each row with the contents of each <td> statement as follows:

Code: [Select]
$repl = array(" ", "(", ")");
$repl_with = array("", "", "");
foreach ($rows_feat as $id2 => $row2){
$features_raw = $scrape->fetchAllBetween('<td','</td>',$row2,true);
//$features_data[str_replace($repl,$repl_with,strtolower(trim($features_raw[1])))] = trim($features_raw[3]);
$countid=$countid+1;

}
The array produced by this would look like:

features_raw[1] = Bedrooms
features_raw[3] = 1



Basically, I want to take data like this:

Beds       1
Baths      1
Garage    Yes

and create an array on the fly:
House[beds]=1
House[baths]=1
House[garage]="yes"


The problem is that the order of Beds, Baths and Garage changes. So on some house pages the order would be Baths, Garage, Beds.. etc.

Any pointers out there?

Thanks,
Brett