What are the potential pitfalls of using single equal signs (=) for assignment instead of double equal signs (==) for comparison in PHP?

Using single equal signs (=) for assignment instead of double equal signs (==) for comparison in PHP can lead to unintended consequences. When using a single equal sign, you are assigning a value to a variable, which can result in unexpected behavior if you meant to compare two values instead. To avoid this issue, always use double equal signs (==) for comparison operations in PHP.

// Incorrect usage of single equal sign for comparison
$number = 5;

if($number = 10) {
    echo "This will always be true!";
}

// Correct usage of double equal sign for comparison
$number = 5;

if($number == 10) {
    echo "This will not be executed.";
}