search in text file

file_search.php

<?php
    // script startup time and memory usage
    $mem_usage  = memory_get_usage();
    $time_usage = microtime(true);
    $return     = 'FALSE';
    $password   = '070162';
    // get password list file from https://github.com/danielmiessler/SecLists/tree/master/Passwords
    /* don't touch the above lines */
    /* ------------------------------------------------------------------- */




    // open file in reading mode
    $fp = fopen('10_million_password_list_top_100000.txt', 'r');
    // read file line by line
    while (($buffer = fgets($fp)) !== false) {
        // compare password with read line , and break the loop if yes
        if(trim($buffer) == $password) {
            $return = 'TRUE';
            break;
        }
    }
    //close file
    fclose($fp);




    /* ------------------------------------------------------------------- */
    /* don't touch the below lines */
    echo 'Return: '.$return."<br />\n";
    // calculate script time and memory usage
    $mem_usage  = ((memory_get_usage() - $mem_usage));
    $time_usage = (microtime(true) - $time_usage);
    if($mem_usage<1024) {
        $mem_usage .= ' bytes';
    }elseif($mem_usage<1048576) {
        $mem_usage = number_format(($mem_usage/1024), 3, '.', '').' kilobytes';
    } else {
        $mem_usage = number_format(($mem_usage/1048576), 3, '.', '').' megabytes';
    }
    echo "----------------------<br />\n";
    echo 'Memory usage: '.$mem_usage." <br />\n";
    echo 'Time speed: '.number_format($time_usage, 3, '.', '')." sec<br />\n";
    echo "----------------------<br />\n";
    echo 'PHP: '.phpversion()." <br />\n";
?>