Two methods for determining string length in PHP are very practical, strings are very practical_PHP tutorial

The two methods for PHP to determine the length of a string are very practical. Strings are very practical.

To determine the length of a string in a PHP program, you can use strlen.

Method 1:

$str = ‘aaaaaa';
if(strlen($str) > 6){
 echo "字符串大于6";
}

Method 2:

if(isset($str{6}){
}

The second method above is more efficient.

In PHP, all variables are saved using a structure -zval. Although strlen directly obtains the len, there is still a function call, and isset is a syntax structure of PHP, so it is faster! So the second method can be used when determining whether a string is greater than or less than a number of characters.

http://www.bkjia.com/PHPjc/1057471.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1057471.htmlTechArticleThe two methods for PHP to determine the length of a string are very practical. Strings are very practical. To determine the length of a string in a PHP program, strlen can be used. Method 1: $str = ‘aaaaaa’;if(strlen($str) 6){ e...