(PHP 5 >= 5.2.0, PHP 7, PHP 8)

mb_striposFinds position of first occurrence of a string within another, case insensitive


    string $haystack,
    string $needle,
    int $offset = 0,
    ?string $encoding = null
): int|false

mb_stripos() returns the numeric position of the first occurrence of needle in the haystack string. Unlike mb_strpos(), mb_stripos() is case-insensitive. If needle is not found, it returns false.



The string from which to get the position of the first occurrence of needle


The string to find in haystack


The position in haystack to start searching. A negative offset counts from the end of the string.


Character encoding name to use. If it is omitted, internal character encoding is used.


Return the numeric position of the first occurrence of needle in the haystack string, or false if needle is not found.


Version Beschreibung
8.0.0 needle akzeptiert nun eine leere Zeichenkette.
8.0.0 encoding ist nun nullable (akzeptiert den null-Wert).
7.1.0 Support for negative offsets has been added.

Siehe auch

  • stripos() - Findet das erste Vorkommen eines Teilstrings in einem String, unabhängig von Groß- und Kleinschreibung
  • strpos() - Sucht die Position des ersten Vorkommens des Suchstrings in einem String
  • mb_strpos() - Find position of first occurrence of string in a string

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User Contributed Notes 1 note

4 years ago
How works on examples mb_stripos:

First we will watch example on symbols(..?).
= "Look! It's a text! Wow!"; //simple text
$spaceIsHere = mb_stripos($text," "); //you can replace " " on something what you need or want
$text2 = mb_substr($text,$spaceIsHere); //cutting text with $spaceIsHere
print ($text2);
/* Print will show that result:
" It's a text! Wow!"
Look. That " " wasn't cutted, because mb_substr don't write in var position after " " - he write WHERE is " " in string. */

Also it can work on words, sentences...
Here's one of examples:
= "Look! It's a text! Wow!"; //familiar text, right?)
$afterNeededWord = mb_stripos($text,"text!"); //you can replace "text!" on something else what you need
$text3 = mb_substr($text, $afterNeededWord); //cutting string (it is string? im stupid in that question xD)
print ($text3);
/* Print will show that result:
"text! Wow!"
Explaining the same. */

I hope it was useful with my "good" English skills. ;D
Have a nice day, coder.
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