cast string to int php

PHP
intval($string);intval("15");$num = "3.14"; 
$int = (int)$num;//string to int
$float = (float)$num;//string to float$str = "10";
$num = (int)$str;$num = "3.14";
$int = (int)$num;
$float = (float)$num;
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