PHP 5.4.33 Released

stripos

(PHP 5)

striposFind position of first occurrence of a case-insensitive string

Description

int stripos ( string $haystack , string $needle [, int $offset = 0 ] )

Returns the numeric position of the first occurrence of needle in the haystack string.

Unlike strpos(), stripos() is case-insensitive.

Parameters

haystack

The string to search in

needle

Note that the needle may be a string of one or more characters.

If needle is not a string, it is converted to an integer and applied as the ordinal value of a character.

offset

The optional offset parameter allows you to specify which character in haystack to start searching. The position returned is still relative to the beginning of haystack.

Return Values

Returns the position as an integer. If needle is not found, stripos() will return boolean FALSE.

Warning

This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE, such as 0 or "". Please read the section on Booleans for more information. Use the === operator for testing the return value of this function.

Examples

Example #1 stripos() examples

<?php
$findme    
'a';
$mystring1 'xyz';
$mystring2 'ABC';

$pos1 stripos($mystring1$findme);
$pos2 stripos($mystring2$findme);

// Nope, 'a' is certainly not in 'xyz'
if ($pos1 === false) {
    echo 
"The string '$findme' was not found in the string '$mystring1'";
}

// Note our use of ===.  Simply == would not work as expected
// because the position of 'a' is the 0th (first) character.
if ($pos2 !== false) {
    echo 
"We found '$findme' in '$mystring2' at position $pos2";
}
?>

Notes

Note: This function is binary-safe.

See Also

  • strpos() - Find position of first occurrence of a string
  • strrpos() - Find the position of the last occurrence of a substring in a string
  • strrchr() - Find the last occurrence of a character in a string
  • substr() - Return part of a string
  • stristr() - Case-insensitive strstr
  • strstr() - Find first occurrence of a string
  • strripos() - Find position of last occurrence of a case-insensitive string in a string
  • str_ireplace() - Case-insensitive version of str_replace.

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User Contributed Notes 4 notes

up
8
emperorshishire at gmail dot com
5 years ago
I found myself needing to find the first position of multiple needles in one haystack.  So I wrote this little function:

<?php
function multineedle_stripos($haystack, $needles, $offset=0) {
    foreach(
$needles as $needle) {
       
$found[$needle] = stripos($haystack, $needle, $offset);
    }
    return
$found;
}

// It works as such:
$haystack = "The quick brown fox jumps over the lazy dog.";
$needle = array("fox", "dog", ".", "duck")
var_dump(multineedle_stripos($haystack, $needle));
/* Output:
   array(3) {
     ["fox"]=>
     int(16)
     ["dog"]=>
     int(40)
     ["."]=>
     int(43)
     ["duck"]=>
     bool(false)
   }
*/
?>
up
0
spam at wikicms dot org
9 months ago
If you like using ternary operator, I wrote simple example how to use stripos function.
Also, in my example I add "How to use namespaces" for wide knowledges for newbies.

<?php
namespace My;

//You can be free using core functions in your NameSpaces (My)
function stripos($haystack, $needle) {
   
//To call core function (from global NS) you should add backslash only - \func
   
return (FALSE === \stripos($haystack, $needle)) ? FALSE : TRUE;
}

var_dump(stripos($haystack = 'John knows English language.', $needle = 'john')); //TRUE
var_dump(stripos($haystack = 'Sara knows English language too.', $needle = 'john')); //FALSE
?>
up
-1
grf at post dot cz
7 years ago
this would to work with any language, i hope.
tested on czech (eastern europe) lang.

<?php
/****************************************
*    SAFE HIGHLIGHT
****************************************/
/**
* function finds and encase every string in a $needleArr array with
* strings $shearLft (from the left side) and $shearRgt (guess from which
* side).
* already encased needles are IGNORED for any other step, so order
* of needles in $needleArr is pretty important.
*
* function is searching needles in case-insensitive mode,
* but case in the subject is saved.
*
* can you do it better? so, do it.
*
* @param array $needleArr array of needles
* @param string $shearLft left shear
* @param string $shearRgt right shear
* @param string $subject subject
* @param string $encoding encoding ('utf-8' is default)
*
* @author griffin
*/
function safeHighlight( $needleArr, $shearLft, $shearRgt, $subject, $encoding = 'utf-8')
{
   
   
// encoding
   
$e = $encoding;
   
   
// oh, no needles
   
if( !is_array( $needleArr))
        return
$subject;
       
   
// empty keys throw-off, only unique, reindex
   
$nA = array_values(
           
array_unique(
               
array_diff( $needleArr, array(''))
            )
        );
   
   
// needle count
   
if( !($nC = count( $nA)))
        return
$subject; // nothing to hl
       
    // shear length
   
if( !(($rLL = mb_strlen( $rL = $shearLft, $e))
    + (
$rRL = mb_strlen( $rR = $shearRgt, $e))))
        return
$subject; // no shears
   
    // subject length
   
if( !($sL = mb_strlen( $s = $subject, $e)))
        return
null; // empty subject
       
    // subject in lowercase (we need to aviod
    // using mb_stripos due to PHP version)
   
$sW = mb_strtolower( $s, $e);
   
   
// masking ~ 0=not changed, 1=changed
   
$m = str_repeat( '0', $sL);
   
   
// loop for each needle
   
for( $n=0; $n<$nC; $n++)
    {
       
       
// needle string loWercase
       
$nW = mb_strtolower( $nA[ $n], $e);
       
       
$o = 0; // offset
       
$nL = mb_strlen( $nW, $e); // needle length

        // search needle
       
while( false !== ($p = mb_strpos( $sW, $nW, $o, $e)))
        {
           
// oh hurrey, needle found on $p position
           
            // is founded needle already modified? (in full-length)
           
for( $q=$p; $q<($p+$nL); $q++)
                if(
$m[ $q])
                {
                   
// ai, caramba. already modified, jump over
                   
$o+= $nL;
                   
                   
// continue for while() loop - not for for() loop!
                   
continue 2;
                }
           
           
// explode subject and mask into three parts
            // partA|needle|partB
           
$sE[0] = mb_substr( $s, 0, $p, $e);
           
$sE[1] = mb_substr( $s, $p, $nL, $e);
           
$sE[2] = mb_substr( $s, $p+$nL, $sL-$p-$nL, $e);
           
           
// mask
            // partA|partB (needle not needed)
           
$mE[0] = mb_substr( $m, 0, $p, $e);
           
$mE[1] = mb_substr( $m, $p+$nL, $sL-$p-$nL, $e);
           
           
// apply shears
           
$sE[1] = $rL.$sE[1].$rR;
           
           
// update sunject length
           
$sL+= $rLL + $rRL;
           
           
// update mask
           
$m = $mE[0] . str_repeat( '1', $rLL + $nL + $rRL) . $mE[1];
           
           
// implode into a subject
           
$s = implode( $sE);
           
           
// update lowercase subject
           
$sW = mb_strtolower( $s, $e);
           
           
// increase offset
           
$o+= $rLL + $nL + $rRL;
           
           
// end of string reached
           
if( $o>=$sL)
                break;
           
        }
// while()
       
   
} // for( $n=0; $n<$nC; $n++)
   
    // oouu yeaaa, kick the subject out of the function
   
return $s;
   
}
// function safeHighlight()
/****************************************
*    END: SAFE HIGHLIGHT
****************************************/
?>
up
-5
steve at opilo dot net
1 year ago
A handy function if you need to adjust layout based on whether or not a string contains descending letters:

<?php function containsDescenders($text) {
   
$descenders = array("g","j","p","q","y");
    foreach (
$descenders as $letter) {
        if (
stripos($text,$letter) !== false) {
            return
true;
        }
    }
    return
false;
}
?>
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