(PHP 5)

striposFind position of first occurrence of a case-insensitive string


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.



The string to search in


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.


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

If needle is not found, stripos() will return boolean FALSE.


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

$mystring1 'xyz';
$mystring2 'ABC';

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

// Nope, 'a' is certainly not in 'xyz'
if ($pos1 === false) {
"The string '$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 ($pos2 !== false) {
"We found '$findme' in '$mystring2' at position $pos2";


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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