mb_strstr Finds first occurrence of a string within another &reftitle.description; stringfalsemb_strstr stringhaystack stringneedle boolbefore_needle&false; stringnullencoding&null; mb_strstr finds the first occurrence of needle in haystack and returns the portion of haystack. If needle is not found, it returns &false;. &reftitle.parameters; haystack The string from which to get the first occurrence of needle needle The string to find in haystack before_needle Determines which portion of haystack this function returns. If set to &true;, it returns all of haystack from the beginning to the first occurrence of needle (excluding needle). If set to &false;, it returns all of haystack from the first occurrence of needle to the end (including needle). encoding Character encoding name to use. If it is omitted, internal character encoding is used. &reftitle.returnvalues; Returns the portion of haystack, or &false; if needle is not found. &reftitle.changelog; &Version; &Description; &mbstring.changelog.needle-empty; &mbstring.changelog.encoding-nullable; &reftitle.seealso; stristr strstr mb_stristr