What are the potential pitfalls of using = for comparison instead of == or === in PHP code?

Using = for comparison instead of == or === in PHP code can lead to unintended side effects as it is the assignment operator, not the comparison operator. This can result in unexpected behavior in your code and difficult-to-debug errors. To avoid this issue, always use == or === for comparison operations in PHP. 

// Incorrect usage of = for comparison
if ($variable = 10) {
    echo "This will always be true!";
}

// Corrected code using == for comparison
if ($variable == 10) {
    echo "This will only be true if variable is equal to 10";
}

Keywords

assignment operator comparison operator type coercion strict comparison PHP code

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