How can the performance of a PHP script like the one provided be optimized when using functions like file_get_contents and preg_match?

Using functions like file_get_contents and preg_match can be resource-intensive and slow down the performance of a PHP script, especially when dealing with large files or complex regular expressions. To optimize the performance, consider using alternative functions like fopen and fgets for reading files line by line instead of loading the entire file into memory with file_get_contents. Additionally, try to minimize the use of preg_match by optimizing your regular expressions and avoiding unnecessary iterations. 

// Open the file for reading line by line
$handle = fopen("example.txt", "r");

// Loop through each line of the file
while (($line = fgets($handle)) !== false) {
    // Perform your regular expression match here
    if (preg_match("/pattern/", $line)) {
        // Do something with the matched line
        echo $line;
    }
}

// Close the file handle
fclose($handle);

Keywords

file_get_contents preg_match performance optimization PHP script functions

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