What are the potential pitfalls of comparing the result of strpos to a string value instead of a boolean value in PHP?

When comparing the result of strpos to a string value instead of a boolean value in PHP, the potential pitfall is that strpos can return 0 if the substring is found at the beginning of the string. Since 0 is a falsy value in PHP, it can lead to incorrect comparisons. To solve this issue, always use strict comparison (===) to check the result of strpos against false to ensure accurate comparisons. 

$string = "Hello, World!";
$substring = "Hello";

if (strpos($string, $substring) !== false) {
    echo "Substring found in the string.";
} else {
    echo "Substring not found in the string.";
}

Keywords

strpos string comparison boolean comparison type coercion PHP

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