stripslashes
if stristr($message,'viagra')
or stristr($message,'cialis')
)
{
die();
}
Works quite well in any Shoutbox, Forum, Guestbook, Mailform, etcetera.
Just enter between the definitions and sending the message to the DB, et voila. ^_^
Description
Retourne une sous-chaîne de haystack , allant de la première occurrence de needle jusqu'à la fin de la chaîne.
Liste de paramètres
- haystack
-
La chaîne à chercher.
- needle
-
Si needle n'est pas une chaîne, elle sera convertie en entier, et utilisée comme code ASCII du caractère correspondant.
- before_needle
-
Si vaut TRUE (par défaut, vaut FALSE), stristr() retourne la partie de haystack avant la première occurrence de needle .
needle et haystack sont traitées sans tenir compte de la casse.
Valeurs de retour
Retourne la partie de la chaîne correspondante. Si needle n'est pas trouvé, la fonction retourne FALSE.
Historique
| Version | Description |
|---|---|
| 5.3.0 | Ajout du paramètre optionnel before_needle . |
| 4.3.0 | stristr() s'effectue en respectant les chaînes binaires. |
Exemples
Exemple #1 Exemple avec stristr()
<?php
$email = 'USER@EXAMPLE.com';
echo stristr($email, 'e'); // Affiche ER@EXAMPLE.com
echo stristr($email, 'e', true); // Depuis PHP 5.3.0, Affiche US
?>
Exemple #2 Teste si une chaîne de caractères est trouvée ou pas
<?php
$string = 'Hello World!';
if(stristr($string, 'terre') === FALSE) {
echo '"terre" non trouvé dans la chaîne de caractères';
}
// affiche : "terre" non trouvé dans la chaîne de caractères
?>
Exemple #3 Utilisation d'une "chaîne de caractères" en chiffre
<?php
$string = 'POMME';
echo stristr($string, 112); // 112 = p minuscule
// Affiche : POMME
?>
Notes
Note: Cette fonction gère les chaînes binaires.
Voir aussi
- strstr() - Trouve la première occurrence dans une chaîne
- strrchr() - Trouve la dernière occurrence d'un caractère dans une chaîne
- substr() - Retourne un segment de chaîne
- preg_match() - Expression rationnelle standard
add a note
User Contributed Notesstristr
carel at ckbt dot org
13-May-2009 03:18
13-May-2009 03:18
tomas dot nesrovnal at yourspirit dot cz
18-Dec-2008 08:36
18-Dec-2008 08:36
Active item item in menu:
<?php
function aim($page) {
if(stristr($_SERVER['REQUEST_URI'], $page)) {
return ' class="active"';
}
}
?>
usage:
<style type="text/css">
.active {color: red;}
</style>
<?php
print '<a href="http://example.com/page/hello-world/"'. aim('hello-world') .'>HW</a>';
?>
giz at gbdesign dot net
06-Oct-2007 12:02
06-Oct-2007 12:02
Just been caught out by stristr trying to converting the needle from an Int to an ASCII value.
Got round this by casting the value to a string.
<?php
if( !stristr( $file, (string) $myCustomer->getCustomerID() ) ) {
// Permission denied
}
?>
art at awilton dot dotcom
07-Nov-2005 05:17
07-Nov-2005 05:17
handy little bit of code I wrote to take arguments from the command line and parse them for use in my apps.
<?php
$i = implode(" ",$argv); //implode all the settings sent via clie
$e = explode("-",$i); // no lets explode it using our defined seperator '-'
//now lets parse the array and return the parameter name and its setting
// since the input is being sent by the user via the command line
//we will use stristr since we don't care about case sensitivity and
//will convert them as needed later.
while (list($index,$value) = each($e)){
//lets grap the parameter name first using a double reverse string
// to get the begining of the string in the array then reverse it again
// to set it back. we will also "trim" off the "=" sign
$param = rtrim(strrev(stristr(strrev($value),'=')),"=");
//now lets get what the parameter is set to.
// again "trimming" off the = sign
$setting = ltrim(stristr($value,'='),"=");
// now do something with our results.
// let's just echo them out so we can see that everything is working
echo "Array index is ".$index." and value is ".$value."\r\n";
echo "Parameter is ".$param." and is set to ".$setting."\r\n\r\n";
}
?>
when run from the CLI this script returns the following.
[root@fedora4 ~]# php a.php -val1=one -val2=two -val3=three
Array index is 0 and value is a.php
Parameter is and is set to
Array index is 1 and value is val1=one
Parameter is val1 and is set to one
Array index is 2 and value is val2=two
Parameter is val2 and is set to two
Array index is 3 and value is val3=three
Parameter is val3 and is set to three
[root@fedora4 ~]#
triadsebas at triads dot buildtolearn dot net
21-Jul-2005 12:39
21-Jul-2005 12:39
You can use strstr() or stristr() to validate data!
Check this out:
<?php
function validate_email($input) {
if (!stristr($input, '@')) {
return false;
}
return true;
}
function validate_url($input) {
if (!stristr($input, 'http://')) {
return false;
}
return true;
}
?>
Simple example:
<?php
if (!validate_email($_POST['email'])) {
print 'You did not enter a valid email adress';
}
if (!validate_url($_POST['url'])) {
print 'You did not enter a valid url.';
}
?>
notepad at codewalkers dot com
05-Jun-2005 08:02
05-Jun-2005 08:02
<?php
function stristr_reverse($haystack, $needle) {
$pos = stripos($haystack, $needle) + strlen($needle);
return substr($haystack, 0, $pos);
}
$email = 'USER@EXAMPLE.com';
echo stristr_reverse($email, 'er');
// outputs USER
?>
Techdeck at Techdeck dot org
12-Nov-2002 08:26
12-Nov-2002 08:26
An example for the stristr() function:
<?php
$a = "I like php";
if (stristr("$a", "LikE PhP")) {
print ("According to \$a, you like PHP.");
}
?>
It will look in $a for "like php" (NOT case sensetive. though, strstr() is case-sensetive).
For the ones of you who uses linux.. It is similiar to the "grep" command.
Actually.. "grep -i".
dpatton.at.confluence.org
03-Oct-2002 04:36
03-Oct-2002 04:36
There was a change in PHP 4.2.3 that can cause a warning message
to be generated when using stristr(), even though no message was
generated in older versions of PHP.
The following will generate a warning message in 4.0.6 and 4.2.3:
stristr("haystack", "");
OR
$needle = ""; stristr("haystack", $needle);
This will _not_ generate an "Empty Delimiter" warning message in
4.0.6, but _will_ in 4.2.3:
unset($needle); stristr("haystack", $needle);
Here's a URL that documents what was changed:
http://groups.google.ca/groups?selm=cvshholzgra1031224321%40cvsserver