What are the differences between == and === in PHP comparisons?

The main difference between == and === in PHP comparisons is that == checks for equality only in terms of value, while === checks for both value and data type. When using ==, PHP will attempt to convert variables to the same type before making the comparison, which can lead to unexpected results. It is generally recommended to use === for strict comparisons to ensure that both the value and data type are the same. 

// Example of using === for strict comparison
$a = 5;
$b = "5";

if ($a === $b) {
    echo "Equal in value and data type";
} else {
    echo "Not equal in value or data type";
}

Keywords

PHP comparison operators loose comparison strict comparison type coercion

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