在信息時代，數據就是一種寶貴資源。公司網站的展示頁有許多用戶的手機號碼，但是為了防止競爭對手采集電話號碼信息或者說提高他們采集數據的難度。于是就有了電話號碼以圖片格式輸出的這個需求。下面已yii為例講解：

php代碼：

class SiteController extends Controller {public function actionGetPhone($id){//從redis緩存里面讀取數據，你可以根據你的實際情況讀取數據$redis = new RedisCache;$res = $redis->getInfo($id, $this->id);if (!$res) {Yii::app()->end();}$res = json_decode($res['model'], TRUE);//endheader("Cache-Control: private, max-age=10800, pre-check=10800");header("Pragma: private");header("Expires: " . date(DATE_RFC822, strtotime(" 1 year")));if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) &&(strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) == $res['update_time'])) {header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $res['update_time']) . ' GMT', TRUE, 304);Yii::app()->end();}$phone = explode(',', $res['phone']);/** This page creates a simple image.* The image makes use of a TrueType font.*/// Establish image factors:$text = $phone[0];$font_size = Yii::app()->request->getParam('fs'); // Font size is in pixels.if (!$font_size) {$font_size = 14;}$font_file = Yii::app()->basePath . '/data/Georgia.ttf'; // This is the path to your font file.// Retrieve bounding box:$type_space = imagettfbbox($font_size, 0, $font_file, $text);// Determine image width and height, 10 pixels are added for 5 pixels padding:$image_width = abs($type_space[4] - $type_space[0]) + 2;$image_height = abs($type_space[5] - $type_space[1]) + 2;// Create image:$image = imagecreatetruecolor($image_width, $image_height);// Allocate text and background colors (RGB format):$text_colors = Yii::app()->request->getParam('fc');//文本顏色if ($text_colors) {$text_colors = explode(',', $text_colors);} else {$text_colors = array(0, 0, 0);}$bg_colors = Yii::app()->request->getParam('bc');//背景顏色if ($bg_colors) {$bg_colors = explode(',', $bg_colors);} else {$bg_colors = array(255, 255, 255);}$text_color = imagecolorallocate($image, $text_colors[0], $text_colors[1], $text_colors[2]);$bg_color = imagecolorallocate($image, $bg_colors[0], $bg_colors[1], $bg_colors[2]);// Fill image:imagefill($image, 0, 0, $bg_color);// Fix starting x and y coordinates for the text:$x = 0; // Padding of 5 pixels.$y = $image_height - 5; // So that the text is vertically centered.// Add TrueType text to image:imagettftext($image, $font_size, 0, $x, $y, $text_color, $font_file, $text);// Using imagepng() results in clearer text compared with imagejpeg()header('Content-type:image/png');header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $res['update_time']) . ' GMT');imagepng($image);imagedestroy($image);}}

html代碼：

<a style="cursor:default;padding-left: 25px;"><img class="serve-master-number"> </a>

js代碼：

這里是js異步請求的方式加載。

//電話號碼以圖片格式輸出$('.serve-master-number').attr('src', '<?php echo Yii::app()->request->baseUrl; ?>/site/getPhone/id/<?php echo $value['masterInfo']['master_id'] ?>/fs/14/fc/254,143,0/bc/255,255,255');

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