The method for php to intercept the first few digits of data is:
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// 访问字符串中的单个字符 // 也可以使用中括号 $string = 'abcdef'; echo $string[0]; // a echo $string[3]; // d echo $string[strlen($string)-1]; // f ?>
中文字符串的截取和获取长度 mb_substr() $str = '我abc是谁'; //utf-8编码的字符串 echo mb_substr($str, 0, 2, 'utf-8'); //输出 我a
$str = '我是谁'; //gbk编码的字符串 echo mb_substr($str, 0, 1, 'gbk'); //输出 我
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