What best practices should PHP developers follow when working with string manipulation and comparison in PHP?

When working with string manipulation and comparison in PHP, it's important to use the correct functions and methods to ensure accurate results. Developers should avoid using '==' for string comparison as it can lead to unexpected behavior due to type juggling. Instead, they should use '===' for strict comparison to compare both value and type. 

// Incorrect way using '=='
$string1 = "10";
$string2 = 10;

if ($string1 == $string2) {
    echo "Strings are equal";
} else {
    echo "Strings are not equal";
}

// Correct way using '==='
$string1 = "10";
$string2 = 10;

if ($string1 === $string2) {
    echo "Strings are equal";
} else {
    echo "Strings are not equal";
}

Keywords

string manipulation comparison PHP functions libraries error handling data validation

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