mb_strstr Finds first occurrence of a string within another &reftitle.description; stringmb_strstr stringhaystack stringneedle boolpartfalse stringencoding 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 part 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. If set to &false;, it returns all of haystack from the first occurrence of needle to the end, 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.seealso; stristr strstr mb_stristr