strlen

stripslashes

[edit] Last updated: Tue, 18 Jun 2013

stristr

(PHP 4, PHP 5)

stristr — Version insensible à la casse de strstr()

Description

string stristr ( string $haystack , mixed $needle [, bool $before_needle = false ] )

Retourne une sous-chaîne de haystack, allant de la première occurrence de needle (incluse) 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, stristr() retourne la partie de haystack avant la première occurrence de needle (needle exclus).

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
stripos() - Recherche la position de la première occurrence dans une chaîne, sans tenir compte de la casse
strpbrk() - Recherche un ensemble de caractères dans une chaîne de caractères
preg_match() - Expression rationnelle standard

strlen

stripslashes

[edit] Last updated: Tue, 18 Jun 2013

add a note User Contributed Notes stristr - [11 notes]

down

dpatton.at.confluence.org ¶

10 years ago


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

down

tomas dot nesrovnal at yourspirit dot cz ¶

4 years ago


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>'; 

?>

down

notepad at codewalkers dot com ¶

8 years ago


<?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





?>

down

greg at no_ggmac_reply dot com ¶

2 years ago


Beware the example given here:



if stristr($message,'viagra')

or stristr($message,'cialis')

)

{

die();

}



stristr does not search for words, it finds matching substrings.  So, for example, the check for 'cialis' will trigger on 'specialist'

down

giz at gbdesign dot net ¶

5 years ago


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


}


?>

down

Techdeck at Techdeck dot org ¶

10 years ago


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".

down

-1

triadsebas at triads dot buildtolearn dot net ¶

7 years ago


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.';


}


?>

down

art at awilton dot dotcom ¶

7 years ago


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 ~]#

down

-1

jahforlove at gmail dot com ¶

2 years ago


Use it to emulate the before_needle php V5.3 :



<?php

//$h = haystack, $n = needle 

if($pos=stripos($h,$n)) $string=substr($h,0,$pos);

?>

down

-1

carel at ckbt dot org ¶

4 years ago


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. ^_^

down

-2

andy ¶

3 years ago


Quick way to use this with an array for a needle:





<?php


$arr = array('search_term1','search_term2','search_term3');





foreach($arr as $key => $search_needle) {





   if(stristr($haystack, $search_needle) != FALSE) {


        echo 'execute this code if found';


   }





}


?>

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