Test the speed of writing 10,000 random strings 100 times each (1,000,000 lines total) to disk. Run as "time php write_speed.php"

write_speed.php

<?php

// Length of each line
$length = 40;

// Open up a file
$file = fopen("test.txt", "w");

// Generate 10,000 strings
for ($iii=0; $iii<=10000; $iii++) {

        // Generate the random string
        $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        $size = strlen( $chars );
        $str = "";
        for( $i = 0; $i < $length; $i++ ) {
                $str .= $chars[ rand( 0, $size - 1 ) ];
        }

        // Write this string to file 100 times
        for ($ii=0; $ii<=100; $ii++) {
                fwrite($file, $str . "\n");
        }

        // Loop to get to next random string
}

// Close the file
fclose($file);