Diese Funktion extrahiert Email Adressen aus einem vorgegebenen String und gibt ein Array zurück.
function extract_emails($str){
// This regular expression extracts all emails from
// a string:
$regexp = '/([a-z0-9_\.\-])+\@(([a-z0-9\-])+\.)+([a-z0-9]{2,4})+/i';
preg_match_all($regexp, $str, $m);
return isset($m[0]) ? $m[0] : array();
}
$test_string = 'This is a test string...
test1@example.org
Test different formats:
test2@example.org;
<a href="test3@example.org">foobar</a>
<test4@example.org>
strange formats:
test5@example.org
test6[at]example.org
test7@example.net.org.com
test8@ example.org
test9@!foo!.org
foobar
';
print_r(extract_emails($test_string));
/*
Returns this array:
Array
(
[0] => test1@example.org
[1] => test2@example.org
[2] => test3@example.org
[3] => test4@example.org
[4] => test5@example.org
[5] => test7@example.net.org.com
)
*/
Quelle: jonasjohn.de
Mit dieser Regular Expression kann man auf einfache Weise Sonderzeichen aus einem String entfernen.
preg_replace('/[^a-z0-9]/i', '_', $string)
Dieses Codebeispiel zeigt, wie man einen Bild in einen base64 String umwandelt
<title>Image to Base64 String</title>
<fieldset>
<legend>Image to Base64 String</legend>
<center>
<form name="select_all">
/**
* @author vir0e5 a.k.a banditc0de
* @copyright 2010 by vir0e5
* @authorurl http://facebook.com/vir0e5.vbs
* @Blog http://banditc0de.blogspot.com
This code will help you to learn how we can convert an image into a base64 string!!
*/
echo"<h3><p>Image</p></h3>";
//$file = File Image yang ingin di encode
//Filetype: JPEG,PNG,GIF
$file = "encode.jpg";
if($fp = fopen($file,"rb", 0))
{
$gambar = fread($fp,filesize($file));
fclose($fp);$base64 = chunk_split(base64_encode($gambar));
//Result
$encode = '<img src="data:image/jpg/png/gif;base64,' . $base64 .'" >';
echo $encode;
}
?>
<br><textarea name="text_area" rows="20" cols="70"><? echo $encode; ?></textarea>
<p><input type="button" value="Select All Code" onClick="javascript:this.form.text_area.focus();this.form.text_area.select();"></p>
</form>
</center>
</fieldset>[/php]
Quelle
<title>Image to Base64 String</title>
<fieldset>
<legend>Image to Base64 String</legend>
<center>
<form name="select_all">
/**
* @author vir0e5 a.k.a banditc0de
* @copyright 2010 by vir0e5
* @authorurl http://facebook.com/vir0e5.vbs
* @Blog http://banditc0de.blogspot.com
This code will help you to learn how we can convert an image into a base64 string!!
*/
echo"<h3><p>Image</p></h3>";
//$file = File Image yang ingin di encode
//Filetype: JPEG,PNG,GIF
$file = "encode.jpg";
if($fp = fopen($file,"rb", 0))
{
$gambar = fread($fp,filesize($file));
fclose($fp);$base64 = chunk_split(base64_encode($gambar));
//Result
$encode = '<img src="data:image/jpg/png/gif;base64,' . $base64 .'" >';
echo $encode;
}
?>
<br><textarea name="text_area" rows="20" cols="70"><? echo $encode; ?></textarea>
<p><input type="button" value="Select All Code" onClick="javascript:this.form.text_area.focus();this.form.text_area.select();"></p>
</form>
</center>
</fieldset>[/php]
Quelle: phpsnips
/* Convert string to hex */
function str_to_hex($string){
$hex='';
for ($i=0; $i < strlen($string); $i++){
$hex .= dechex(ord($string[$i]));
}
return $hex;
}/* Convert hex to string */
function hex_to_str($hex){
$string='';
for ($i=0; $i < strlen($hex)-1; $i+=2){
$string .= chr(hexdec($hex[$i].$hex[$i+1]));
}
return $string;
}// example :
$hex = str_to_hex("test sentence...");
// $hex contains 746573742073656e74656e63652e2e2eprint hex_to_str($hex);
// outputs: test sentence...
?>[/php]
Einlesen einer Textdatei in eine String-Variable mittels fgets.
// file example 1: read a text file into a string with fgets$filename="input.txt";
$output="";
$file = fopen($filename, "r");
while(!feof($file)) {//read file line by line into variable
$output = $output . fgets($file, 4096);}
fclose ($file);
echo $output;?>[/php]