string mb_strstr (  string $haystack ,  string $needle [,  bool $before_needle = false [,  string $encoding =mb_internal_encoding() ]]  )//mb_strstr() finds the first occurrence of needle in haystack and returns the portion of haystack. If needle is not found, it returns FALSE.//mb_strstr() 查找了 needle 在 haystack 中首次的出現(xiàn)并返回 haystack 的一部分。 如果 needle 沒有找到，它將返回 FALSE。

<?php/** * Created by PhpStorm. * User: zhangrongxiang * Date: 2018/2/1 * Time: 下午10:27 *///* * If set to true, it returns all of haystack from the beginning to the first occurrence of needle.$strstr = mb_strstr( "hello china", "ll", true );echo $strstr . PHP_EOL; //he//* If set to false, it returns all of haystack from the first occurrence of needle to the end,$strstr = mb_strstr( "hello china", "ll", false );echo $strstr . PHP_EOL;//llo china//hello chinaecho mb_strstr( "hello china", "ll", true ) . mb_strstr( "hello china", "ll", false ) . PHP_EOL;$strstr = mb_strstr( "hello China,hello PHP", "ll", true );echo $strstr . PHP_EOL; //he$strstr = mb_strstr( "hello China,hello PHP", "ll", false );echo $strstr . PHP_EOL; //llo China,hello PHP$strstr = mb_strstr( "PHP是世界上最好的語言
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