What is the significance of using "===" for comparison in PHP and how does it differ from "=="?

Using "===" in PHP for comparison is significant because it not only compares the values of the variables, but also checks if they are of the same data type. This means that "===" will return true only if both the values and the data types of the variables are the same. On the other hand, "==" only compares the values of the variables, disregarding their data types. 

// Using "===" for strict comparison
$num1 = 5;
$num2 = "5";

if ($num1 === $num2) {
    echo "The values and data types are the same.";
} else {
    echo "The values or data types are different.";
}

Keywords

PHP comparison operators strict comparison loose comparison data type coercion

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