20c01-1.php

来自「介绍PHP5的给类型函数应用」· PHP 代码 · 共 37 行

<?php
// A function that accepts a parameter to specify a length, and then returns
// a random password with characters and letters
function random_password($length = 8) {
	// Declare a blank string to start from
	$pass = '';
	
	// Now loop for as many times as the length
	for ($i = 0; $i < $length; $i++) {
		// For this character, first give an equal chance of upper,lower,num
		switch (rand(0,2)) {
			case 0: 
				// Generate a Number from 0 to 9
				$pass .= rand(0,9);
				break;
			case 1:
				// Generate a letter from A to Z via ascii values 65 to 90
				$pass .= chr(rand(65,90));
				break;
			default:
				// Instead use a letter from a to z, via ascii 97 to 122
				$pass .= chr(rand(97,122));
		}
	}
	
	// Return that password!
	return $pass;
}

// Test this, echo out a batch of 10 passwords, from 1 to 10 characters long
echo "<ol>\n";
foreach (range(1,10) as $l) {
	$tmp = random_password($l);
	echo "<li>{$tmp}</li>\n";
}
echo "</ol>\n";
?>