--TEST-- stristr() function --FILE-- --EXPECTF-- string(11) "tEsT sTrInG" string(6) "sTrInG" string(6) "sTrInG" string(8) "T sTrInG" string(1) "G" string(32) "7272696018bdeb2c9a3f8d01fc2a9273" string(0) "" string(1) "a" bool(false) string(32) "6ec19f52f0766c463f3bb240f4396913" string(7) " sTrInG"