本文實例講述了PHP code 驗證碼生成類定義和簡單使用。分享給大家供大家參考，具體如下：

code.php

<?phpnamespace code;/** * Class Code */class Code{ protected $number;//驗證碼內字符個數 protected $codeType;//驗證碼樣式 protected $width;//圖像寬 protected $height;//圖像高 protected $code;//驗證碼 protected $image;//圖像資源 /** * Code constructor. * @param int $number * @param int $codeType * @param int $width * @param int $height */ public function __construct($number=5, $codeType=2, $width=100, $height=40) { $this->number = $number; $this->codeType = $codeType; $this->width = $width; $this->height = $height; $this->code = $this->createCode(); } /** * 銷毀資源 */ public function __destruct() { imagedestroy($this->image); } /** * 外部調用code時觸發 * @param $name * @return bool */ public function __get($name) { if (’code’ == $name) { return $this->$name; } else { return false; } } /** * 生成code */ protected function createCode() { switch ($this->codeType) { case 0:$code = $this->getNum();break; case 1:$code = $this->getChar();break; case 2:$code = $this->getNumChar();break; default:die(’樣式不對’); } return $code; } /** * 數字驗證碼 * @return string */ protected function getNum() { $str = join(’’, range(0,9)); return substr(str_shuffle($str), 0, $this->number); } /** * 字符驗證碼 * @return string */ protected function getChar() { $str = join(’’, range(’a’, ’z’)); $str = $str . strtoupper($str); return substr(str_shuffle($str), 0, $this->number); } /** * 字符和數字混合驗證碼 * @return string */ protected function getNumChar() { $num = join(’’, range(0, 9)); $str = join(’’, range(’a’, ’z’)); $str_big = strtoupper($str); $numChar = $num . $str . $str_big; return substr(str_shuffle($numChar), 0, $this->number); } /** * 生成圖像 */ protected function createImage() { $this->image = imagecreatetruecolor($this->width, $this->height); } /** * 填充背景色 */ protected function fillColor() { imagefill($this->image, 0, 0, $this->lightColor()); } /** * 淺顏色 * @return int */ protected function lightColor() { return imagecolorallocate($this->image, mt_rand(170, 255), mt_rand(170, 255), mt_rand(170, 255)); } /** * 深顏色 * @return int */ protected function darkColor() { return imagecolorallocate($this->image, mt_rand(0, 120), mt_rand(0, 120), mt_rand(0, 120)); } /** * 添加驗證碼字符 */ protected function drawChar() { $width = ceil($this->width/$this->number); for ($i = 0; $i < $this->number; $i++) { $x = mt_rand($i * ($width - 5), ($i + 1) * ($width - 5)); $y = mt_rand(0, $this->height - 15); imagechar($this->image, 5, $x, $y, $this->code[$i], $this->darkColor()); } } /** * 添加干擾點 */ protected function drawDisturb() { for ($i= 0; $i < 100; $i++) { imagesetpixel($this->image, mt_rand(0, $this->width), mt_rand(0, $this->height), $this->darkColor()); } } /** * 添加干擾線 */ protected function drawArc() { for ($i = 0; $i < $this->number - 3; $i++) { imagearc($this->image, mt_rand(5, $this->width), mt_rand(5, $this->height), mt_rand(5, $this->width), mt_rand(5, $this->height),mt_rand(0, 70), mt_rand(300, 360), $this->darkColor()); } } /** * 輸出顯示 */ protected function show() { header(’Content-Type:image/png’); imagepng($this->image); } /** * 外部image */ public function outImage() { $this->createImage();//創建畫布 $this->fillColor();//填充背景色 $this->drawChar();//添加驗證字符 $this->drawDisturb();//添加干擾點 $this->drawArc();//添加干擾線 $this->show();//輸出 }}

展示驗證碼。。保存驗證碼和過期時間

<?phpinclude ’./code/Code.php’; $code = new codeCode();$code->outImage();session_start();$_SESSION[’code’] = [ ’code’ => $code->code, ’exp_time’ => time() + (60 * 60 * 10),];

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希望本文所述對大家PHP程序設計有所幫助。