How to convert string numbers into integers in php

#How to convert string numbers into integers in php?

Use PHP's built-in function intval to convert variables.

<?php 
$foo = "1"; // $foo 是字符串类型 
$bar = intval($foo); // $bar 是整型 
?>

The format of the intval function is: int intval(mixed $var [, int $base]);

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