Are there any specific guidelines for handling whitespace when comparing strings in PHP?

When comparing strings in PHP, it is important to handle whitespace properly to ensure accurate comparisons. One common approach is to use the `trim()` function to remove leading and trailing whitespace from both strings before comparing them. This ensures that any extra spaces or tabs do not affect the comparison result. 

$string1 = "  Hello ";
$string2 = "Hello";

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

Keywords

string comparison whitespace handling PHP guidelines trim function strcmp function

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