Integer php code example

Example 1: convert string to int php

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

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

Example 2: php to int

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

Example 3: php "?int"

// ? means $count can be NULL or integer, maybe PHP >=7.4
private ?int $count