What is the best way to extract code from a file between two specific strings in PHP?

To extract code from a file between two specific strings in PHP, you can read the file line by line and use a flag to determine when to start and stop extracting the code. When the starting string is found, set the flag to true, and when the ending string is found, set the flag to false. Keep appending the lines to a variable until the flag is false, which will give you the code between the two strings. 

<?php
$file = 'example.txt';
$startString = 'START';
$endString = 'END';
$extractedCode = '';

$flag = false;
$handle = fopen($file, 'r');
if ($handle) {
    while (($line = fgets($handle)) !== false) {
        if (strpos($line, $startString) !== false) {
            $flag = true;
            continue;
        }
        if (strpos($line, $endString) !== false) {
            $flag = false;
            break;
        }
        if ($flag) {
            $extractedCode .= $line;
        }
    }
    fclose($handle);
}
echo $extractedCode;
?>

Keywords

PHP file handling string manipulation regular expressions parsing

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