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PHP Functions

Function: stripos

(PHP 5)

stripos --  Find position of first occurrence of a case-insensitive string

Description

int stripos ( string haystack, string needle [, int offset] )

Returns the numeric position of the first occurrence of needle in the haystack string . Unlike strpos() , stripos() is case-insensitive.

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

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.

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";
}
?>

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

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 .

Note: This function is binary-safe.

Related Function(s)

  • strpos()
  • strrpos()
  • strrchr()
  • substr()
  • stristr()
  • strstr()
  • strripos()
  • str_ireplace()
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