stripos

(PHP 5)

striposFind the position of the first occurrence of a case-insensitive substring in a string

Description

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

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

Unlike the 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

If specified, search will start this number of characters counted from the beginning of the string. Unlike strrpos() and strripos(), the offset cannot be negative.

Return Values

Returns the position of where the needle exists relative to the beginnning of the haystack string (independent of offset). Also note that string positions start at 0, and not 1.

Returns FALSE if the needle was not found.

Warning

This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE. 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 the position of the first occurrence of a substring in a string
  • strrpos() - Find the position of the last occurrence of a substring in a string
  • strripos() - Find the position of the last occurrence of a case-insensitive substring in a string
  • stristr() - Case-insensitive strstr
  • substr() - Return part of a string
  • str_ireplace() - Case-insensitive version of str_replace.

Коментарии

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)
   }
*/
?>
2009-02-24 21:31:52
http://php5.kiev.ua/manual/ru/function.stripos.html
Regarding the function by spam at wikicms dot org

It is very bad practice to use the same function name as an existing php function but have a different output format.  Someone maintaining the code in the future is likely to be very confused by this.  It will also be hard to eradicate from a codebase because the naming is identical so each use of stripos() would have to be analyzed to see how it is expecting the output format (bool or number/bool).

Calling it string_found() or something like that would make a lot more sense for long-term use.
2015-03-04 16:08:11
http://php5.kiev.ua/manual/ru/function.stripos.html
Автор:
Regarding the === note, it might be worth clarifying that the correct tests for a binary found/not found condition are  !==false to detect found, and ===false to detect not found.
2015-08-29 13:25:57
http://php5.kiev.ua/manual/ru/function.stripos.html
Unlike strpos() it seems that stripos() does NOT issue a WARNING if the needle is an empty string ''.
2018-08-02 04:48:15
http://php5.kiev.ua/manual/ru/function.stripos.html
Finding numbers in strings requires you to cast the number to string first.

strpos("123", 2) !== strpos("123", "2")
2018-08-19 17:07:04
http://php5.kiev.ua/manual/ru/function.stripos.html

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