<?php session_start(); // Шрифты TTF $im = imageCreateFromJPEG ("images/noise.jpg"); $black = imagecolorallocate($im, 64, 64, 64); // Включаем сглаживание imageantialias($im, true); // Число символов $nChars = 5; // Случайная строка $randStr = substr(md5(uniqid()), 0, $nChars); $_SESSION["randStr"] = $randStr; // Координаты $x = 20; $y = 30; $deltaX = 40; for ($i=0; $i<strlen($randStr); $i++) { $size = rand(18, 30); $angle = -30 + rand(0,60); imageTTFText($im, $size, $angle, $x, $y, $black, "fonts/bellb.ttf", $randStr{$i}); $x += $deltaX; } header("Content-type: image/jpeg"); imageJPEG($im, "", 75); ?>

The code (captcha) from the video course "Specialist. Level 3. Film 6". Explain, please, I do not quite understand why the rand () function costs -30+. In the film, this is not explained, I watched it in the manual, also this nuance is somehow omitted.

    1 answer 1

    I think the authors simply did not begin to chew on quite obvious things: to get values ​​from -30 to +30.