How can the use of strpos or preg_match impact the performance of a PHP application?

Using strpos or preg_match can impact the performance of a PHP application because these functions are computationally expensive, especially when used on large strings or with complex regular expressions. To improve performance, consider using more efficient string manipulation functions like strstr or substr for simple string searches, and limit the use of regular expressions to only when necessary. 

// Example of using strstr instead of strpos for simple string search
$haystack = "Hello World";
$needle = "World";

if (strstr($haystack, $needle) !== false) {
    echo "Found";
} else {
    echo "Not found";
}

Keywords

strpos preg_match performance impact PHP application

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