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Two methods for determining string length in PHP are very practical, strings are very practical_PHP tutorial
- WBOYOriginal
- 2016-07-12 09:08:05821browse
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.
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