PHP - Working With Php's Dom Functions
I'm using php's DOM functions to strip some information out of a block of HTML:
Code: [Select] for ($i = 0; $i <= $tot_tblocks-1; $i++) { // Load the HTML blocks... $dom = new DOMDocument(); $dom->loadHTML($tblock[$i]); $xpath = new DOMXPath($dom); $tags = $xpath->query('//div[@class="desc"]/h2[@class="name"]'); // Get the part I want... foreach ($tags as $tag) { $tname[$i] = trim($tag->nodeValue); echo $tname[$i]."<br>"; } } Two questions: 1 - There is actually ever only one item ("name"), can I access it without the foreach loop? $tname[$i] = trim($tags->nodeValue); doesn't work. 2 - This code extracts content between tags of certain class names. But I would also like to extract the values of certain attributes of some of those tags, such as - perhaps - the value of the href in a <a> tag. The tag may not have unique class name, but I could still get an array from all the <a> tags in the source block? But I don't know how, and haven't been successful in deciphering the documentation... Any ideas? Similar TutorialsI attempted to try to do what was in the comments, but I am not able to do it any help is appreciated Code: [Select] <?php $a = array(9, 3, 1, 0, 99, 2, 5, 6, 32, 1, 55); $b = array(9, 18, 1, 0, 23, 22, 4, 6, 5, 32, 55); function getAverage () { echo "The average is " . array_sum($a) . "\n"; // Show the sum of the entire array (should display 19.36) } getAverage(); echo "<br><br>"; function highestValue() { echo $a[max]; // Show the index value of the highest number (should display 4) echo $a(max); // Show the value of index 4 (should display 99) echo $a[min]; // Show the index value of lowest number (should display 3) echo $a(min); // Show the value of index 4 (should display 0) } highestValue(); echo "<br><br>"; function displayMatch() { //Write a function that tests the values of both arrays. If the values at the same index match display the following: "The values at <insert the matching index> match." } displayMatch(); ?> I have a file I'm trying to split up to separate some HTML from PHP code. Everything works fine when all of the code is together but when I split it into two files the two call back functions in the html form will not work. No errors and when I view the page source my file is included with the form. Any help would be appreciated. Here is the file that has the include statement. add_action('admin_menu', 'sampleoptions_add_page_fn'); // Add sub page to the Settings Menu function sampleoptions_add_page_fn() { add_options_page('Options Example Page', 'Options Example', 'administrator', __FILE__, 'options_page_fn'); } function options_page_fn() { ?> <?php include('options_form.php'); ?> <?php } Here is the options_form.php file code. Code: [Select] <div class="wrap"> <div class="icon32" id="icon-options-general"><br></div> <h2>My Example Options Page</h2> Some optional text here explaining the overall purpose of the options and what they relate to etc. <form action="options.php" method="post"> <?php settings_fields('plugin_options'); ?> <?php do_settings_sections(__FILE__); ?> <p class="submit"> <input name="Submit" type="submit" class="button-primary" value="<?php esc_attr_e('Save Changes'); ?>" /> </p> </form> </div> I'm guessing that it may have to do with this line of code, due to the page parameter but I don't know that much about that area. <?php do_settings_sections(__FILE__); ?> Thanks in advance I have a script I am putting together that simulate a cricket game. The only issue is, that there are a huge number of functions because there doesn't seem to be any other way to do this properly. As well as this, there a while() loop and all this seems to be leading to the page reaching a max 30 second timeout when generating the result. My code is attached below, it is quite messy at the moment because i've just be working on it, but I was wondering if anyone has any solutions of how I can speed this up or change to prevent a timeout: <?php // Error reporting error_reporting(E_ALL); // Connect DB mysql_connect("wickettowicket.adminfuel.com", "rockinaway", "preetha6488") or die(mysql_error()); // Select DB mysql_select_db("wickettowicket") or die(mysql_error()); // MySQL queries to find batsmen and bowlers $array_batsmen = mysql_query('SELECT id, name, ability, strength FROM wtw_players WHERE team_id = 1 ORDER BY id ASC'); $array_bowlers = mysql_query('SELECT id, name, ability, strength FROM wtw_players WHERE team_id = 2'); // Start table for data $data = '<table width="600px">'; // Create blank scorecard while ($array_bat = mysql_fetch_array($array_batsmen)) { $data .= '<tr><td>'.$array_bat['name'].'</td><td></td><td></td><td>0</td></tr>'; } // Set up arrays for players $current_batsman = $current_bowler = array(); // Reset query mysql_data_seek($array_batsmen,0); $in_one = $in_two = $it = ''; function currentBatsman($id, $name, $ability, $strength, $out, $in, $runs) { global $current_batsman; $current_batsman = array ( 'id' => $id, 'name' => $name, 'ability' => $ability, 'strength' => $strength, 'out' => $out, 'in' => $in, 'runs' => $runs ); echo 'set current'; } // Set up arrays of batsmen while ($array = mysql_fetch_array($array_batsmen)) { if ($it < 3 && $in_one == '') { currentBatsman($array['id'], $array['name'], $array['ability'], $array['strength'], 0, 1, 0); $batsmen[$array['id']] = array ( 'id' => $array['id'], 'name' => $array['name'], 'ability' => $array['ability'], 'strength' => $array['strength'], 'out' => 0, 'in' => 1, 'runs' => 0 ); $in_one = $array['id']; $current = $array['id']; $it++; } else if ($it < 3 && $in_two == '') { $batsmen[$array['id']] = array ( 'id' => $array['id'], 'name' => $array['name'], 'ability' => $array['ability'], 'strength' => $array['strength'], 'out' => 0, 'in' => 1, 'runs' => 0 ); $in_two = $array['id']; $it++; } else { $batsmen[$array['id']] = array ( 'id' => $array['id'], 'name' => $array['name'], 'ability' => $array['ability'], 'strength' => $array['strength'], 'out' => 0, 'in' => 0, 'runs' => 0 ); } } // Bowler Array while ($array = mysql_fetch_array($array_bowlers)) { $bowlers[] = array ( 'name' => $array['name'], 'ability' => $array['ability'], 'strength' => $array['strength'] ); } // Reset both queries mysql_data_seek($array_bowlers,0); mysql_data_seek($array_batsmen,0); function changeBatsman($just_out) { global $array_batsmen, $batsmen; //Update array $batsmen[$just_out] = array ( 'in' => 1, 'out' => 1 ); while ($array = mysql_fetch_array($array_batsmen)) { if ($just_out != $array['id'] && $batsmen[$array['id']]['out'] != 0) currentBatsman($array['id'], $array['name'], $array['ability'], $array['strength'], 0, 1, 0); } // Reset query mysql_data_seek($array_batsmen,0); echo 'change batsman'; } function swapBatsman($other_batsman) { global $array_batsmen, $batsman; while ($array = mysql_fetch_array($array_batsmen)) { if ($other_batsman != $array['id'] && $batsman[$array['id']]['out'] != 0 && $batsman[$array['id']]['in'] == 1) currentBatsman($array['id'], $array['name'], $array['ability'], $array['strength'], 0, 1, 0); } // Reset query mysql_data_seek($array_batsmen,0); echo 'swap batsman'; } $runs = $outs = $balls = $overs = 0; $played = array(); function selectBowler() { global $bowlers, $current_bowler; // Select random bowler $choose_bowler = array_rand($bowlers, 1); $current_bowler = array ( 'name' => $bowlers[$choose_bowler]['name'], 'ability' => $bowlers[$choose_bowler]['ability'], 'strength' => $bowlers[$choose_bowler]['strength'] ); } /* function selectBatsman(); { global $array_batsmen; while ($array_batsmen[]['out'] != 1) { }*/ function bowl() { global $batsmen, $bowlers, $current_bowler, $current_batsman, $data, $balls, $outs, $runs; if ($current_batsman['out'] == 0) { echo 'bowling'; // Set the initial number $number = rand(0, 190); // Ability of batsman if ($current_batsman['ability'] > 90) $number += 30; else if ($current_batsman['ability'] > 70) $number += 15; else if ($current_batsman['ability'] > 50) $number += 2; else $number = $number; // Strength of batsman if ($current_batsman['strength'] > 90) $number += 15; else if ($current_batsman['strength'] > 70) $number += 10; else if ($current_batsman['strength'] > 50) $number += 5; else $number = $number; // Depending on overs if ($balls > 270) $number += 30; else if ($balls > 120) $number -= 10; // Ability if ($current_bowler['ability'] > 90) $number -= 30; else if ($current_bowler['ability'] > 70) $number -= 15; else if ($current_bowler['ability'] > 50) $number -= 2; else $number = $number; // If batsman has made a huge total of runs, we need to knock some numbers off - more likely to get out if ($current_batsman['runs'] > 200) $number -= 70; else if ($current_batsman['runs'] > 100) $number -= 30; // Finally sort out runs if ($number > 190) $run = 6; else if ($number > 170) $run = 4; else if ($number > 160) $run = 3; else if ($number > 100) $run = 2; else if ($number > 50) $run = 1; else if ($number > 10) $run = 0; else if ($balls > 120 && $number > 0) $run = 0; else $run = -1; // Increase number of balls $balls += 1; // Are they out? if ($run == -1) { $current_batsman['out'] = 1; $played[] = $current_batsman['id']; $find = '<tr><td>'.$current_batsman['name'].'</td><td></td><td></td><td>0</td></tr>'; $replace = '<tr><td>'.$current_batsman['name'].'</td><td></td><td>'.$current_bowler['name'].'</td><td>'.$current_batsman['runs'].'</td></tr>'; $data = str_replace($find, $replace, $data); changeBatsman($current_batsman['id']); echo 'out'; } else { $current_batsman['runs'] += $run; $runs += $run; if ($run == 1 || $run == 3) { swapBatsman($current_batsman['id']); echo 'time to swap'; } echo $run; } // Count outs if ($current_batsman['out'] == 1) $outs += 1; } } function game() { global $main, $batsmen, $bowlers, $data, $batted, $balls, $outs, $current_batsman; // Check if possible while ($balls <= 295 && $outs < 10) { selectBowler(); // Actually bowl now bowl(); } } game(); echo $data; I teaching myself php, but I am coming from java and other compiled languages, so the process has been a little bumpy. I am trying to do something like this: Code: [Select] class my_class { function one () { $two = two (); $three = three (); $five = $two + $three; return $five; } function two () { $two = 2; return $two; } function three () { $three = 3; return $three; } } Unfortunately, I keep getting an error message saying that my call to two () is an undefined function. I am gathering from this that the scope of one () is not aware of the existence of two (). Is there a way to get around this so I can call two () and three () from one ()? Hi, I've got 3 different upload forms in one form. I'm making a function so it just one piece of code. I'm having a bit of a problem changing some of the code so it works for all 3. Here is the function function loadImages ($action, $position) { $link = mysql_connect("","",""); if (!$link) { die('Error: could not connect: ' . mysql_error()); } $db_select = mysql_select_db("",$link); if (!$db_select) { die ("Error: database selection failed: " . mysql_error()); } $page = ($_POST["pageName"]); if ((($_FILES["bfile"]["type"] == "image/gif") || ($_FILES["bfile"]["type"] == "image/jpeg") || ($_FILES["bfile"]["type"] == "image/pjpeg")) && ($_FILES["bfile"]["size"] < 9000000)) { if ($_FILES["bfile"]["error"] > 0) { echo "Return Code: " . $_FILES["bfile"]["error"] . "<br />"; } else { $success = '<p style="font-weight: bold; color: #C00">Upload successful<br />'; // move uploaded temporary file to final destination move_uploaded_file($_FILES["bfile"]["tmp_name"], "uploads/" . $_FILES["bfile"]["name"]); // update database with new filename $filename = $_FILES["bfile"]["name"]; $sql = "UPDATE images SET filename= '$filename' where page = '$page' and position = '$position'"; if (!mysql_query($sql,$link)) { die('Error: ' . mysql_error()); } } } else { $fail = '<p style="font-weight: bold; color: #C00">Invalid file'; } mysql_close($link); } Now the $action is the bit that will determine whether it's updateTop updateMiddle or updateBottom. $position finds out if it's top middle or bottom if (isset($_POST['updateTop'])) { loadImages ($_POST['updateTop'], "top"); } Here is a sample of the html, it's in a switch case "Products": echo "<p>Image Top</p> <input type=\"file\" name=\"file\" id=\"file\" /> <input type=\"submit\" name=\"updateTop\" value=\"Update $page Top\" /> <p>Image Middle</p> <input type=\"file\" name=\"mfile\" id=\"mfile\" /> <input type=\"submit\" name=\"updateMiddle\" value=\"Update $page Middle\" /> <p>Image Bottom</p> <input type=\"file\" name=\"bfile\" id=\"bfile\" /> <input type=\"submit\" name=\"updateBottom\" value=\"Update $page Bottom\" /> "; break; What I need to do is get $_FILES["bfile" into a variable to see whether it's "bfile" "mfile" or "file" but not sure how to write it. Thanks for the help. Can someone tell me by looking at the following code why function pcust() does not work, I am new to programming? Code: [Select] $firstname = "chris"; $surname = "reynolds"; $address1 = "12 birch end"; $town = "Wallington"; $county = "surrey"; $postcode = "wh20 3bg"; $telephone = "01372 854785"; $cust_details = fix_cust($firstname, $surname, $address1,$town, $county, $postcode, $telephone ); function fix_cust($n1, $n2, $n3, $n4, $n5, $n6, $n7) { $n1 = ucfirst(strtolower($n1)); $n2 = ucfirst(strtolower($n2)); $n3 = ucwords(strtolower($n3)); $n4 = ucfirst(strtolower($n4)); $n5 = ucfirst(strtolower($n5)); $n6 = ucfirst(strtoupper($n6)); $n7 = ucfirst(strtolower($n7)); return array($n1, $n2, $n3, $n4, $n5, $n6, $n7); } echo $cust_details[0] . " " . $cust_details[1]; echo "<br />"; echo $cust_details[2]; echo "<br />"; echo $cust_details[3]; echo "<br />"; echo $cust_details[4]; echo "<br />"; echo $cust_details[5]; echo "<br />"; echo $cust_details[6]; echo "<br />"; function pcust(){ $length = count($cust_details ); for ($i = 0; $i < $length; $i++) { echo $cust_details[$i]; echo "<br />"; } } pcust(); i am wondering what the '@' is used for when used in front of a function like Function(@$VAR); What is the benefit of the @? Hey guys. Can anyone tell me what this means? function foo { } It is basic php but I don't get it. Should it be called for execution, or does it work automatically, or both? The php manual at w3schools and php.net are too tough for me. That's why I posted here. Thanks! When in OOP I have been watching tutorials and some have functions just written like Code: [Select] class user { public $user; public function __construct($u) { $this->user = $u; } } do I need to type public before the function or is it better practice to just put Code: [Select] class user { public $user; function __construct($u) { $this->user = $u; } } Thanks! As painfully simple as this may be, I seem to be doing something wrong as always. New to php and decided to start using functions. I'm trying to add functions from an external functions.php file to my other pages and then call the functions where necessary. How should I go about it? I tried something like this: Functions.php: Code: [Select] <?php function field() { echo 'text heherh'; } ?> and then when calling it to when needed for example: include 'includes/functions.php'; // at the top of the page Code: [Select] <?php // and when trying to call the function on a specific line if (!$sname) $errorstring = $errorstring . "<b>Surname:" . field() ; //field being the function name ?> I know this is very simple but I have never used functions before.. tried google, didn't help much and I'm pressed for time so decided to ask here. Thanks in advance Hi. I am trying to write a function but they are new to me and confusing me. On multiple pages I am requesting users details. I thought instead of writing out the query every time I want to do this I would include a functions page with the query in it. The only variable I carry from the user is the user name as a session when they log in. The user name is the email address of the person signed in. so here is my first function. As im sure you can see it doesn't work but I don't understand why or how to call it properly. Can someone please explain.... function GetUser($user = "") { $qFindUser = "SELECT * FROM members WHERE email = '$user'"; $rFindUser = mysql_query($qFindUser) or die (mysql_error()); $UserInfo = mysql_fetch_array($rFindUser); } calling the function to return all details of a member as an array. <?php $Name = $_SESSION['MM_Username']; $UserInfo = GetUser($Name); echo $UserInfo['forename']; ?> I have a function to get some data from the database. However it always comes back with: Code: [Select] Notice: Undefined variable: db in C:\wamp\www\ASF A Simple Forum\functions\functions.php on line 233 Fatal error: Call to a member function query() on a non-object in C:\wamp\www\ASF A Simple Forum\functions\functions.php on line 233 here is the code: require_once(ASF_ROOT."includes/init.php"); // this is where the db connection is function get_db_info($type, $select, $table, $where="", $order="DESC", $limit="") { if (empty($type) || empty($select) || empty($table)) { try { throw new emptyArgs(); } catch (emptyArgs $invalid) { echo "<div style=\"border:1px solid #f00; padding:5px; width:350px; line-height:10px;\">"; echo "<b>$invalid</b>"; echo "<p>get_info() needs atleast 3 arguments (Type, Select and Table) - none supplied</p>"; echo "</div>"; } } else { if ($type == "num") { $query = $db->query(" SELECT $select FROM ".TBL_PREFIX."$table $where $order $limit ") or die($db->error()); $result = $db->num_rows(MYSQLI_NUM); return $result; } else { $query = $db->query(" SELECT $select FROM ".TBL_PREFIX."$table $where $order $limit "); $result = $query->fetch_array(MYSQL_ASSOC); return $result; } } } I have a function for mysqli_real_escape_string above this function and it works with no errors. Have i done something wrong? as you can see i am including the file which holds the connection but it doesnt seem to use it. every other file that uses the connection works fine. Hi, I could use a little guidance here. 1) is a function with values to be sent to 2). 1) <!-- use ajax - OnCalc function to send data to your database. --> function OnCalc(value1,op,value2,total) { 2) php file using above function values <?php header( "refresh:5;url='http://localhost/hom...lcprint.php'"); echo 'You\'ll be redirected in about 5 secs. If not, click <a href="http://localhost/hom...hp">here</a>.'; echo '<script type="text/javascript">' , 'OnCalc();' , '</script>'; No error but code not working? OK, so if I've got this in my one of my class files: public function userr($user) { $thisquery = mysql_query("SELECT * FROM users WHERE username='". $user ."'"); if(mysql_num_rows($thisquery) == 1) { return true; } return false; } Could I use something like this: if($class->userr($user)) { // Something } If not, how would I go about doing something like it? And is there any way I could use a mysql_fetch_assoc in a function? Hi there. How do I stop a function from running it it's taking to long to proccess. For example, say after 10 seconds the code is still working I display an error message? As you can in the following code it's pulling the contents from an url or file which might take too long to load. function Tester($url); { return file_get_contents($url); } Thanks a mil I have a login code that uses die() and when the die code is executed it terminates the rest of the html code. I cant put the html before the php because of meta tag and head tag issues >.< I need a proper working error function that works properly \= like if you login wrong on myspace or facebook a little error message appears in a box and works perfectly. On mine it appears at the bottom of the form and cuts of teh rest of the source code and html >.< Ok so I have these 2 functions set up to secure some things make_safe() is used before putting anything in the database. the make_viewable() function is used to display the data that was made safe. function make_safe($string) { // used before adding to db return addslashes($string); } function make_viewable($string) { // used before displaying anywhere return stripslashes($string); } is this enough or is there anything else to make this secure. Thanks Shane Hi, just a quick question. Should functions really be used for tasks such as in my example below? I’m attempting to use some for smaller tasks to improve readability and reduce code repetition. Or should they be used for larger tasks?
functions.php
function accessDenied(){ $_SESSION[‘error’] = "You cannot view that page, you wally"; header(‘location: error.php’); exit; }page.php if(!$loggedin){ accessDenied(); } Edited by paddy_fields, 12 August 2014 - 08:44 AM. Can someone give me an actual time when functions would become handy? Thanks! I have some variables that I have set with the global command but they don't seem to be working correctly. It's probably my order of operation but not sure. Here's the stripped down version of whats going on: locator() //functions function geoip() global $zip, $city, $areacode, $metrocode, $state, $country, $latitude, $longitude; function locator() geoip() use globals from geoip pass to- ad_display() function ad_display() does some work stat_tracking() function stat_tracking() access global $zip, $city, $areacode, $metrocode, $state, $country, $latitude, $longitude; The problem is once I call stat_tracking() and try to access the global variables, they are all empty. Just to clarify the chain of events is: page loads, calls locator(), locator() calls function geoip() fine then passes work to ad_display(), ad_display() calls stat_tracking(), stat_tracking() now tries to access the globals I made but all variables are blank if I echo them. Any ideas? |