note 90437 modified in function.ereg by danbrown
| From: | danbrown@php.net | Date: | Wed, 22 Apr 2009 12:54:16 +0000 |
| Subject: | note 90437 modified in function.ereg by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-153583@lists.php.net to get a copy of this message | ||
Here a little clear and easy script
that I wrote to validate an E-Mail Input.
I tried to understand ereg,
but the describtion on php.net did not help me,
so I made some research and finally (think)
that Im sure how to use ereg.
The following function works for me well and allows
an E-Mail to contain the following characters:
"A-Z, a-z, 0-9, . , - , _ "
<?php
function validateMail($mail) {
if($mail !== "") {
if(!ereg("^[A-Za-z0-9\.|-|_]*
[@]{1}[A-Za-z0-9\.|-|_]*[.]{1}[a-z]{2,5}$", $mail)) {
echo "wrong Input for E-Mail";
$mail ="";
return $mail;
}
else {
return $mail;
}
}
}
?>
to make it clear:
^ means begin here (startpoint of ereg)
$ means end here (endpoint of ereg)
* stand for endless characters (I want A-Z, a-z, 0-9 and the other characters to apear from 0 to
endless
optional you can write {1,5} for
min 1 times a character or max 5 times a
characters instead of *
{1,2} means min 1 time a character and max 2 times a character (optional you can write * intead of
{1,2}
{1} stand for max 1 time a character
\ means from here special characters (like .-_$ and so on)
| means OR
--was--
Here a little clear and easy script
that I wrote to validate an E-Mail Input.
I tried to understand ereg,
but the describtion on php.net did not help me,
so I made some research and finally (think)
that Im sure how to use ereg.
The following function works for me well and allows
an E-Mail to contain the following characters:
"A-Z, a-z, 0-9, . , - , _ "
function validateMail($mail) {
if($mail !== "") {
if(!ereg("^[A-Za-z0-9\.|-|_]*
[@]{1}[A-Za-z0-9\.|-|_]*[.]{1}[a-z]{2,5}$", $mail)) {
echo "wrong Input for E-Mail";
$mail ="";
return $mail;
}
else {
return $mail;
}
}
}
to make it clear:
^ means begin here (startpoint of ereg)
$ means end here (endpoint of ereg)
* stand for endless characters (I want A-Z, a-z, 0-9 and the other characters to apear from 0 to
endless
optional you can write {1,5} for
min 1 times a character or max 5 times a
characters instead of *
{1,2} means min 1 time a character and max 2 times a character (optional you can write * intead of
{1,2}
{1} stand for max 1 time a character
\ means from here special characters (like .-_$ and so on)
| means OR
http://php.net/manual/en/function.ereg.php