PHP code examples

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This is a small collection of code examples for the PHP programming language

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PHP code examples

  1. 1. PHP Code examples By PHP resources PHP resources
  2. 2. Contents Contents................................................................................................................................................2 Check for valid email address............................................................................................................3 Getting real IP address.......................................................................................................................3 Resize Image......................................................................................................................................4 Import CSV File..................................................................................................................................5 iPhone & iPod Detection....................................................................................................................5 Display source code of any webpage.................................................................................................5 Display Facebook fans count.............................................................................................................5 Download & save a remote image.....................................................................................................5 Send Mail using mail function in PHP................................................................................................6 HTTP Redirection...............................................................................................................................6 Human Readable Random String ......................................................................................................6 Parse JSON Data ................................................................................................................................7 Parse XML Data .................................................................................................................................7 Directory Listing in PHP......................................................................................................................8 Unzip a Zip File...................................................................................................................................9 Crop Image......................................................................................................................................10 Create Zip Files.................................................................................................................................11 Test whether URL exists...................................................................................................................12 For more programming information and code................................................................................13 PHP resources
  3. 3. Check for valid email address function is_valid_email($email) { if(preg_match("/[a-zA-Z0-9_-.+]+@[a-zA-Z0-9-]+.[a-zA-Z]+/", $email) > 0) return true; else return false; } Getting real IP address function getRealIpAddr() { if (!empty($_SERVER['HTTP_CLIENT_IP'])) //check ip from share internet { $ip=$_SERVER['HTTP_CLIENT_IP']; } elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) //to check ip is pass from proxy { $ip=$_SERVER['HTTP_X_FORWARDED_FOR']; } else { $ip=$_SERVER['REMOTE_ADDR']; } return $ip; } PHP resources
  4. 4. Resize Image Creates a thumbnail from an existing image. $filename is the original filename, while $tmpname is the actual filesystem name (for example, the temporary filename used in a PHP upload). Returns an image resource which you can then output to the browser, or save to a file using imagejpg(), imagepng(), etc. function resize_image($filename, $tmpname, $xmax, $ymax) { $ext = explode(".", $filename); $ext = $ext[count($ext)-1]; if($ext == "jpg" || $ext == "jpeg") $im = imagecreatefromjpeg($tmpname); elseif($ext == "png") $im = imagecreatefrompng($tmpname); elseif($ext == "gif") $im = imagecreatefromgif($tmpname); $x = imagesx($im); $y = imagesy($im); if($x <= $xmax && $y <= $ymax) return $im; if($x >= $y) { $newx = $xmax; $newy = $newx * $y / $x; } else { $newy = $ymax; $newx = $x / $y * $newy; } $im2 = imagecreatetruecolor($newx, $newy); imagecopyresized($im2, $im, 0, 0, 0, 0, floor($newx), floor($newy), $x, $y); return $im2; } PHP resources
  5. 5. Import CSV File $handle = fopen("file.csv", 'r'); while(($data = fgetcsv($handle, 1000, ",")) !== false) { list($col1, $col2, ...) = $data; } fclose($handle); iPhone & iPod Detection if(strstr($_SERVER['HTTP_USER_AGENT'],'iPhone') || strstr($_SERVER['HTTP_USER_AGENT'],'iPod')) { header('Location: http://yoursite.com/iphone'); exit(); } Display source code of any webpage <?php $lines = file('http://google.com/'); foreach ($lines as $line_num => $line) { // loop thru each line and prepend line numbers echo "Line #<b>{$line_num}</b> : " . htmlspecialchars($line) . "n"; } Display Facebook fans count function fb_fan_count($facebook_name) { <a href="https://graph.facebook.com/digimantra">https://graph.facebook.com/digimantra</a> $data = json_decode(file_get_contents("https://graph.facebook.com/".$facebook_name)); echo $data->likes; } Download & save a remote image PHP resources
  6. 6. $image = file_get_contents('http://www.url.com/image.jpg'); file_put_contents('/images/image.jpg', $image); Send Mail using mail function in PHP <?php $to = "emailaddress@gmail.com"; $subject = "getph[.net"; $body = "Body of your message $headers = "From: Peterrn"; $headers .= "Reply-To: info@programmershelp.netrn"; $headers .= "Return-Path: info@ programmershelp.net rn"; $headers .= "X-Mailer: PHP5n"; $headers .= 'MIME-Version: 1.0' . "n"; $headers .= 'Content-type: text/html; charset=iso-8859-1' . "rn"; mail($to,$subject,$body,$headers); ?> HTTP Redirection <?php header('Location: http://you_stuff/url.php'); // stick your url here ?> Human Readable Random String /************** *@length - length of random string (must be a multiple of 2) **************/ function readable_random_string($length = 6){ $conso=array("b","c","d","f","g","h","j","k","l", "m","n","p","r","s","t","v","w","x","y","z"); $vocal=array("a","e","i","o","u"); $password=""; srand ((double)microtime()*1000000); $max = $length/2; for($i=1; $i<=$max; $i++) { $password.=$conso[rand(0,19)]; $password.=$vocal[rand(0,4)]; } return $password; } PHP resources
  7. 7. Parse JSON Data $json_string='{"id":1,"name":"foo","email":"foo@foobar.com","interest":["wordpress","php"]} '; $obj=json_decode($json_string); echo $obj->name; //prints foo echo $obj->interest[1]; //prints php Parse XML Data //xml string $xml_string="<?xml version='1.0'?> <users> <user id='398'> <name>Foo</name> <email>foo@bar.com</name> </user> <user id='867'> <name>Foobar</name> <email>foobar@foo.com</name> </user> </users>"; //load the xml string using simplexml $xml = simplexml_load_string($xml_string); //loop through the each node of user foreach ($xml->user as $user) { //access attribute echo $user['id'], ' '; //subnodes are accessed by -> operator echo $user->name, ' '; echo $user->email, '<br />'; } PHP resources
  8. 8. Directory Listing in PHP <?php function list_files($dir) { if(is_dir($dir)) { if($handle = opendir($dir)) { while(($file = readdir($handle)) !== false) { if($file != "." &amp;&amp; $file != ".." &amp;&amp; $file != "Thumbs.db) { echo '<a target="_blank" href="'.$dir.$file.'">'.$file.'</a><br>'."n"; } } closedir($handle); } } } /* To use: <?php list_files("images/"); ?> */ ?> PHP resources
  9. 9. Unzip a Zip File <?php function unzip($location,$newLocation){ if(exec("unzip $location",$arr)){ mkdir($newLocation); for($i = 1;$i< count($arr);$i++){ $file = trim(preg_replace("~inflating: ~","",$arr[$i])); copy($location.'/'.$file,$newLocation.'/'.$file); unlink($location.'/'.$file); } return TRUE; }else{ return FALSE; } } ?> //Use the code as following: <?php include 'functions.php'; if(unzip('zippedfiles/test.zip','unzipped/myNewZip')) echo 'Success!'; else echo 'Error'; ?> PHP resources
  10. 10. Crop Image <?php $filename= "test.jpg"; list($w, $h, $type, $attr) = getimagesize($filename); $src_im = imagecreatefromjpeg($filename); $src_x = '0'; // begin x $src_y = '0'; // begin y $src_w = '200'; // width $src_h = '200'; // height $dst_x = '0'; // destination x $dst_y = '0'; // destination y $dst_im = imagecreatetruecolor($src_w, $src_h); $white = imagecolorallocate($dst_im, 255, 255, 255); imagefill($dst_im, 0, 0, $white); imagecopy($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h); header("Content-type: image/png"); imagepng($dst_im); imagedestroy($dst_im); ?> PHP resources
  11. 11. Create Zip Files function create_zip($files = array(),$destination = '',$overwrite = false) { //if the zip file already exists and overwrite is false, return false if(file_exists($destination) && !$overwrite) { return false; } //vars $valid_files = array(); //if files were passed in... if(is_array($files)) { //cycle through each file foreach($files as $file) { //make sure the file exists if(file_exists($file)) { $valid_files[] = $file; } } } //if we have good files... if(count($valid_files)) { //create the archive $zip = new ZipArchive(); if($zip->open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) { return false; } //add the files foreach($valid_files as $file) { $zip->addFile($file,$file); } //debug //echo 'The zip archive contains ',$zip->numFiles,' files with a status of ',$zip->status; //close the zip -- done! $zip->close(); //check to make sure the file exists return file_exists($destination); } else { return false; } } /***** Example Usage ***/ $files=array('file1.jpg', 'file2.jpg', 'file3.gif'); create_zip($files, 'myzipfile.zip', true); PHP resources
  12. 12. Test whether URL exists function url_exists($url) { $hdrs = @get_headers($url); return is_array($hdrs) ? preg_match('/^HTTP/d+.d+s+2dds+.*$/',$hdrs[0]) : false; } PHP resources
  13. 13. For more programming information and code PHP resources Programmers help Programming site PHP resources

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