PHP string interception function usage

The function that comes with PHP to intercept strings can only handle English. Numbers cannot intercept mixed Chinese characters. The latter example is easier to use. The first one is mainly for beginners to learn. The specific The code is as follows:

".$str."
"; //按各种方式进行截取 $str1 = substr($str,5); echo "从第5个字符开始取至最后：".$str1."
"; $str2 = substr($str,9,4); echo "从第9个字符开始取4个字符：".$str2."
"; $str3 = substr($str,-5); echo "取倒数5个字符：".$str3."
"; $str4 = substr($str,-8,4); echo "从倒数第8个字符开始向后取4个字符：".$str4."
"; $str5 = substr($str,-8,-2); echo "从倒数第8个字符开始取到倒数第2个字符为止：".$str5."
"; ?>

supports mixed Chinese and English interception, the code is as follows:

 $length) { for($i=0; $i < $length; $i++) if (ord($str_cut[$i]) > 128) $i++; $str_cut = substr($str_cut,0,$i).".."; } return $str_cut; } ?>

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