how to convert string into integer in php code example

Example 1: convert string to int php

s = "123";
echo intval(s); // 123

s = "hello";
echo intval(s);	//0

Example 2: cast string to int php

$num = "3.14"; 
$int = (int)$num;//string to int
$float = (float)$num;//string to float

Example 3: php to int

$num = "3.14";
$int = (int)$num;

Example 4: string to int php

$str = "10";
$num = (int)$str;