init & add agent & add job

util4p/Random.class.php

@@ -0,0 +1,51 @@
+<?php
+
+class Random
+{
+	const LEVEL_LOW = 1;
+	const LEVEL_MIDDLE = 2;
+	const LEVEL_HIGH = 3;
+
+	/*
+	 * generate a digit in range of [$min, $max]
+	 * origin: stackoverflow
+	 * notice: this method tends to generate unique numbers compared with rand()
+	 */
+	public static function randomInt($min, $max)
+	{
+		$range = intval($max) - intval($min);
+		if ($range < 1) return $min; // not so random...
+		$log = ceil(log($range, 2));
+		$bytes = (int)($log / 8) + 1; // length in bytes
+		$bits = (int)$log + 1; // length in bits
+		$filter = (int)(1 << $bits) - 1; // set all lower bits to 1
+		do {
+			$rnd = hexdec(bin2hex(openssl_random_pseudo_bytes($bytes)));
+			$rnd = $rnd & $filter; // discard irrelevant bits
+		} while ($rnd >= $range);
+		return $min + $rnd;
+	}
+
+	/*
+	 * generate random string of length $length
+	 * level: LOW - only numbers, MIDDLE - plus letters(upper and lower), HIGH - plus special chars
+	 */
+	public static function randomString($strlen, $level = self::LEVEL_MIDDLE)
+	{
+		$alphabet = '0123456789';
+		if ($level > self::LEVEL_LOW) {
+			$alphabet .= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
+			$alphabet .= 'abcdefghijklmnopqrstuvwxyz';
+		}
+		if ($level > self::LEVEL_MIDDLE)
+			$alphabet .= '+-*/?!%`~@#^&(){}';
+
+		$length = strlen($alphabet);
+		$token = '';
+		for ($i = 0; $i < $strlen; $i++) {
+			$token .= $alphabet[self::randomInt(0, $length - 1)];
+		}
+		return $token;
+	}
+
+}