Preg Match All Links on a Page PHP

Here's the basic principal behind spiders.

$html = file_get_contents('http://www.example.com');

$dom = new DOMDocument();
@$dom->loadHTML($html);

// grab all the on the page
$xpath = new DOMXPath($dom);
$hrefs = $xpath->evaluate("/html/body//a");

for ($i = 0; $i < $hrefs->length; $i++) {
       $href = $hrefs->item($i);
       $url = $href->getAttribute('href');
       echo $url.'<br />';
}

Tutorial Extract Email Addresses

by Unknown in php , Tutorial 0

Just pass the string (e.g. the body part of an email) to the function, and it returns an array of Email Addresses contained in the String.

function extract_emails_from($string) {
         preg_match_all("/[\._a-zA-Z0-9-]+@[\._a-zA-Z0-9-]+/i", $string, $matches);
         return $matches[0];
}

If you catch the return value of function in $emails, you can parse it using foreach:

foreach($emails as $email) {
    echo trim($email).'<br/>';
}

Tutorial Error Page to Handle All Errors

by Unknown in php , Tutorial 0

This is a way to make a single error page for all errors, which is easier to update and maintain.

1) Point all error pages at one location in your .htaccess file

ErrorDocument 400 /error.php
ErrorDocument 401 /error.php
ErrorDocument 403 /error.php
ErrorDocument 404 /error.php
ErrorDocument 500 /error.php
etc.

2) PHP for error.php page in root

$status = $_SERVER['REDIRECT_STATUS'];
$codes = array(
       403 => array('403 Forbidden', 'The server has refused to fulfill your request.'),
       404 => array('404 Not Found', 'The document/file requested was not found on this server.'),
       405 => array('405 Method Not Allowed', 'The method specified in the Request-Line is not allowed for the specified resource.'),
       408 => array('408 Request Timeout', 'Your browser failed to send a request in the time allowed by the server.'),
       500 => array('500 Internal Server Error', 'The request was unsuccessful due to an unexpected condition encountered by the server.'),
       502 => array('502 Bad Gateway', 'The server received an invalid response from the upstream server while trying to fulfill the request.'),
       504 => array('504 Gateway Timeout', 'The upstream server failed to send a request in the time allowed by the server.'),
);

$title = $codes[$status][0];
$message = $codes[$status][1];
if ($title == false || strlen($status) != 3) {
       $message = 'Please supply a valid status code.';
}
// Insert headers here
echo '<h1>'.$title.'</h1>
<p>'.$message.'</p>';
// Insert footer here

Tutorial English Time to Seconds

by Unknown in php , Tutorial 0

Just type in the time you want converted to seconds in english (e.g. "1 hour and 30 minutes") and it will be converted to an integer of seconds (e.g. 5400). Thanks to Baylor Rae.

function time2seconds($time) {

 preg_match_all('/(\d+ [a-z]+)/', $time, $matches);
 
 $matches = $matches[0];

 $formats = array();

 foreach ($matches as $format) {
   preg_match('/(\d+)\s?([a-z]+)/', $format, $f);
   $time = $f[1];
   $type = $f[2];
   $formats[$type] = $time;
 }

 $output = array(
     'years' => 0,
     'months' => 0,
     'days' => 0,
     'hours' => 0,
     'minutes' => 0,
     'seconds' => 0
 );

 foreach ($formats as $format => $time) {
   if( $time == 0 )
     continue;

   switch ($format) {
     case 'year' :
     case 'years' :
       $output['years'] = $time * 12 * 30 * 24 * 60 * 60;
     break;

     case 'month' :
     case 'months' :
       $output['months'] = $time * 30 * 24 * 60 * 60;
     break;

     case 'day' :
     case 'days' :
       $output['days'] = $time * 24 * 60 * 60;
     break;

     case 'hour' :
     case 'hours' :
       $output['hours'] = $time * 60 * 60;
     break;

     case 'minute' :
     case 'minutes' :
       $output['minutes'] = $time * 60;
     break;

     case 'second' :
     case 'seconds' :
       $output['seconds'] = $time;
     break;
   }

 }

 return $output['years'] + $output['months'] + $output['days'] + $output['hours'] + $output['minutes'] + $output['seconds'];
}

Simple Usage

Form submits "time":

<form method="post">
	<label for="time">Time</label><br />
	<input type="text" name="time" id="time" size="50" value="<?php echo (isset($_POST['time'])) ? $_POST['time'] : '1 hour 30 minutes' ?>" />
	<button name="submit">Test!</button>
</form>

If "time" is set, use the function and echo what is returned:

if (isset($_POST)) {
  echo time2seconds($_POST['time']);
}

Reference URL

Tutorial Email Protector

by Unknown in php , Tutorial 0

<?php
	function php_split_js_make_email($phpemail)
	{
		$pieces = explode("@", $phpemail);
	
		echo '
			<script type="text/javascript">
				var a = "<a href=\'mailto:";
				var b = "' . $pieces[0] . '";
				var c = "' . $pieces[1] .'";
				var d = "\' class=\'email\'>";
				var e = "</a>";
				document.write(a+b+"@"+c+d+b+"@"+c+e);
			</script>
			<noscript>Please enable JavaScript to view emails</noscript>
		';
	}
?>

Usage

<?php php_split_js_make_email("youremail@here.com"); ?>

Reference URL

Tutorial Email Address Validation

by Unknown in php , Tutorial 0

Simple

$email = 'mail@example.com';
$validation = filter_var($email, FILTER_VALIDATE_EMAIL);

if ( $validation ) $output = 'proper email address';
else $output = 'wrong email address';

echo $output;

Advanced

This function doesn't only check if the format of the given email address is correct, it also performs a test if the host is existing.

<?php
$email="test@geemail.com";
if (isValidEmail($email))
{
       echo "Hooray! Adress is correct.";
}
else
{
       echo "Sorry! No way.";
}

//Check-Function
function isValidEmail($email)
{
       //Perform a basic syntax-Check
       //If this check fails, there's no need to continue
       if(!filter_var($email, FILTER_VALIDATE_EMAIL))
       {
               return false;
       }

       //extract host
       list($user, $host) = explode("@", $email);
       //check, if host is accessible
       if (!checkdnsrr($host, "MX") && !checkdnsrr($host, "A"))
       {
               return false;
       }

       return true;
}
?>

Regular Expression Test

function checkEmail($email) {
 if(preg_match("/^([a-zA-Z0-9])+([a-zA-Z0-9\._-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9\._-]+)+$/",$email))
 {
    return true;
 }
 return false;
}

The above, with domain name validation:

function checkEmail($email) {
 if(preg_match("/^([a-zA-Z0-9])+([a-zA-Z0-9\._-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9\._-]+)+$/",$email))
 {
    list($username,$domain)=split('@',$email);
    if(!checkdnsrr($domain,'MX')) {
        return false;
      }
 return true;
 }
 return false;
}

Tutorial Display Styled Directory Contents

by Unknown in php , Tutorial 0

Servers can be configured to show the contents of a directory that doesn't have an index file to render. The result is usually less than visually spectacular:

Lackluster default in Chrome

More better, View Demo

We can take control of this ourselves by replicating this functionality with PHP.

Make an index file (.index.php, starting with the dot, really) which reads the files in the directory and outputs them into a table Make an .htaccess file that serves that file as the index Have the index file load in CSS and other resources that are also prefixed with a dot (hidden)

The following PHP reads the directory of files and displays a styled table of their name, file type, and file size. It also applies a class name in which to apply icons for the different major file types (see CSS).

<!doctype html>
<html>

<head>
  <meta charset="UTF-8">
  <title>Directory Contents</title>
  <link rel="stylesheet" href=".style.css">
  <script src=".sorttable.js"></script>
</head>

<body>

  <div id="container">
  
    <h1>Directory Contents</h1>
    
    <table class="sortable">
      <thead>
        <tr>
          <th>Filename</th>
          <th>Type</th>
          <th>Size <small>(bytes)</small></th>
          <th>Date Modified</th>
        </tr>
      </thead>
      <tbody>
      <?php
        // Opens directory
        $myDirectory=opendir(".");
        
        // Gets each entry
        while($entryName=readdir($myDirectory)) {
          $dirArray[]=$entryName;
        }
        
        // Finds extensions of files
        function findexts ($filename) {
          $filename=strtolower($filename);
          $exts=split("[/\\.]", $filename);
          $n=count($exts)-1;
          $exts=$exts[$n];
          return $exts;
        }
        
        // Closes directory
        closedir($myDirectory);
        
        // Counts elements in array
        $indexCount=count($dirArray);
        
        // Sorts files
        sort($dirArray);
        
        // Loops through the array of files
        for($index=0; $index < $indexCount; $index++) {
        
          // Allows ./?hidden to show hidden files
          if($_SERVER['QUERY_STRING']=="hidden")
          {$hide="";
          $ahref="./";
          $atext="Hide";}
          else
          {$hide=".";
          $ahref="./?hidden";
          $atext="Show";}
          if(substr("$dirArray[$index]", 0, 1) != $hide) {
          
          // Gets File Names
          $name=$dirArray[$index];
          $namehref=$dirArray[$index];
          
          // Gets Extensions 
          $extn=findexts($dirArray[$index]); 
          
          // Gets file size 
          $size=number_format(filesize($dirArray[$index]));
          
          // Gets Date Modified Data
          $modtime=date("M j Y g:i A", filemtime($dirArray[$index]));
          $timekey=date("YmdHis", filemtime($dirArray[$index]));
          
          // Prettifies File Types, add more to suit your needs.
          switch ($extn){
            case "png": $extn="PNG Image"; break;
            case "jpg": $extn="JPEG Image"; break;
            case "svg": $extn="SVG Image"; break;
            case "gif": $extn="GIF Image"; break;
            case "ico": $extn="Windows Icon"; break;
            
            case "txt": $extn="Text File"; break;
            case "log": $extn="Log File"; break;
            case "htm": $extn="HTML File"; break;
            case "php": $extn="PHP Script"; break;
            case "js": $extn="Javascript"; break;
            case "css": $extn="Stylesheet"; break;
            case "pdf": $extn="PDF Document"; break;
            
            case "zip": $extn="ZIP Archive"; break;
            case "bak": $extn="Backup File"; break;
            
            default: $extn=strtoupper($extn)." File"; break;
          }
          
          // Separates directories
          if(is_dir($dirArray[$index])) {
            $extn="&lt;Directory&gt;"; 
            $size="&lt;Directory&gt;"; 
            $class="dir";
          } else {
            $class="file";
          }
          
          // Cleans up . and .. directories 
          if($name=="."){$name=". (Current Directory)"; $extn="&lt;System Dir&gt;";}
          if($name==".."){$name=".. (Parent Directory)"; $extn="&lt;System Dir&gt;";}
          
          // Print 'em
          print("
          <tr class='$class'>
            <td><a href='./$namehref'>$name</a></td>
            <td><a href='./$namehref'>$extn</a></td>
            <td><a href='./$namehref'>$size</a></td>
            <td sorttable_customkey='$timekey'><a href='./$namehref'>$modtime</a></td>
          </tr>");
          }
        }
      ?>
      </tbody>
    </table>
  
    <h2><?php print("<a href='$ahref'>$atext hidden files</a>"); ?></h2>
    
  </div>
  
</body>

</html>

The resources loaded in that index file are the top-in table sorter script sortable.js and a .style.css file. (Remember, prefacing the files with a dot makes the invisible in most operating systems, and also won't show up in your directory of files (good)). Here's that CSS:

* {
	padding:0;
	margin:0;
}

body {
	color: #333;
	font: 14px Sans-Serif;
	padding: 50px;
	background: #eee;
}

h1 {
	text-align: center;
	padding: 20px 0 12px 0;
	margin: 0;
}
h2 {
	font-size: 16px;
	text-align: center;
	padding: 0 0 12px 0; 
}

#container {
	box-shadow: 0 5px 10px -5px rgba(0,0,0,0.5);
	position: relative;
	background: white; 
}

table {
	background-color: #F3F3F3;
	border-collapse: collapse;
	width: 100%;
	margin: 15px 0;
}

th {
	background-color: #FE4902;
	color: #FFF;
	cursor: pointer;
	padding: 5px 10px;
}

th small {
	font-size: 9px; 
}

td, th {
	text-align: left;
}

a {
	text-decoration: none;
}

td a {
	color: #663300;
	display: block;
	padding: 5px 10px;
}
th a {
	padding-left: 0
}

td:first-of-type a {
	background: url(./.images/file.png) no-repeat 10px 50%;
	padding-left: 35px;
}
th:first-of-type {
	padding-left: 35px;
}

td:not(:first-of-type) a {
	background-image: none !important;
} 

tr:nth-of-type(odd) {
	background-color: #E6E6E6;
}

tr:hover td {
	background-color:#CACACA;
}

tr:hover td a {
	color: #000;
}





/* icons for file types (icons by famfamfam) */

/* images */
table tr td:first-of-type a[href$=".jpg"], 
table tr td:first-of-type a[href$=".png"], 
table tr td:first-of-type a[href$=".gif"], 
table tr td:first-of-type a[href$=".svg"], 
table tr td:first-of-type a[href$=".jpeg"]
{background-image: url(./.images/image.png);}

/* zips */
table tr td:first-of-type a[href$=".zip"] 
{background-image: url(./.images/zip.png);}

/* css */
table tr td:first-of-type a[href$=".css"] 
{background-image: url(./.images/css.png);}

/* docs */
table tr td:first-of-type a[href$=".doc"],
table tr td:first-of-type a[href$=".docx"],
table tr td:first-of-type a[href$=".ppt"],
table tr td:first-of-type a[href$=".pptx"],
table tr td:first-of-type a[href$=".pps"],
table tr td:first-of-type a[href$=".ppsx"],
table tr td:first-of-type a[href$=".xls"],
table tr td:first-of-type a[href$=".xlsx"]
{background-image: url(./.images/office.png)}

/* videos */
table tr td:first-of-type a[href$=".avi"], 
table tr td:first-of-type a[href$=".wmv"], 
table tr td:first-of-type a[href$=".mp4"], 
table tr td:first-of-type a[href$=".mov"], 
table tr td:first-of-type a[href$=".m4a"]
{background-image: url(./.images/video.png);}

/* audio */
table tr td:first-of-type a[href$=".mp3"], 
table tr td:first-of-type a[href$=".ogg"], 
table tr td:first-of-type a[href$=".aac"], 
table tr td:first-of-type a[href$=".wma"] 
{background-image: url(./.images/audio.png);}

/* web pages */
table tr td:first-of-type a[href$=".html"],
table tr td:first-of-type a[href$=".htm"],
table tr td:first-of-type a[href$=".xml"]
{background-image: url(./.images/xml.png);}

table tr td:first-of-type a[href$=".php"] 
{background-image: url(./.images/php.png);}

table tr td:first-of-type a[href$=".js"] 
{background-image: url(./.images/script.png);}

/* directories */
table tr.dir td:first-of-type a
{background-image: url(./.images/folder.png);}

View Demo Download Files

REMEMBER: The .zip file might appear to be empty, but it's not. The files are all prefaced with a dot. View them in a file editor which shows you "hidden" files.

Special thanks to Cliff White.

Update November 2012: The demo and downloadable files have been updated to 1) show more human readable file sizes 2) have error pages

HOT CSS

Free Beautiful Css templates, Web designer tricks from expert

Preg Match All Links on a Page PHP

Tutorial Extract Email Addresses

Tutorial Error Page to Handle All Errors

1) Point all error pages at one location in your .htaccess file

2) PHP for error.php page in root

Tutorial English Time to Seconds

Simple Usage

Tutorial Email Protector

Usage

Tutorial Email Address Validation

Simple

Advanced

Regular Expression Test

Tutorial Display Styled Directory Contents