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Regular expressions to determine the email and URL, to help see if there is anything to add.

Source: Internet
Author: User
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Regular <body onload= "F.a.select ();" >
<?php
Echo ' A: '. Htmlspecialchars ($a);
Echo ' <br>a1: ';
$a 1 = eregi_replace (' (^[_.] [: alnum:]-]+@ ([: alnum:]][[:alnum:]-]*.) +[[:alpha:]]{2,3}$) ', ' <a href= ' mailto:\1 ' >\1</a> ', $a);
Echo htmlspecialchars ($a 1);
echo "&LT;BR&GT;A1: $a 1";

Echo ' &LT;BR&GT;A2: ';
$a 2 = eregi_replace ([: alnum:]]+://([: alnum:]][[:alnum:]-]*\.) +[[:alpha:]]{2,3} ([#\?/\\][^#\?/\\][:space:]][^[:space:]]*)?) ',
' <a href= ' \1 ' target= ' _blank ' >\1</a> ', $a);
Echo Htmlspecialchars ($a 2);
echo "&LT;BR&GT;A2: $a 2";
Eregi (' ^[_.] [: alnum:]-]+@ ([: alnum:]][[:alnum:]-]*\.) +[[:alpha:]]{2,3}$ ', $a) or die ("not a email");
?>

<form name= "F" >
<input name= "A" value= "<?php echo $a;?>" >
<input type= "Submit" >
</form>

</body>


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