如何用PHP技术将文字嵌入到图片中？

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本示例展示了如何使用PHP实现文字写入图片的功能。以下是一段示例代码，供大家参考：

php/** * PHP实现文字写入图片的示例代码 */

class wordsOnImg{ public $config=null;

/** * 构造函数 * @param array $config 配置参数 */ public function __construct($config=null) { $this->config=$config; }

/** * 文字写入图片 * @param string $text 要写入的文字 * @param string $imgPath 图片路径 * @param string $savePath 保存路径 * @return bool */ public function writeTextOnImg($text, $imgPath, $savePath) { // ... 实现文字写入图片的代码 ... return true; // 返回写入成功 }}

本文实例为大家分享了PHP实现文字写入图片的具体代码，供大家参考，具体内容如下

/** * PHP实现文字写入图片 */ class wordsOnImg { public $config = null; /** * @param $config 传入参数 * @param $config['file'] 图片文件 * @param $config['size'] 文字大小 * @param $config['angle'] 文字的水平角度 * @param $config['fontfile'] 字体文件路径 * @param $config['width'] 预先设置的宽度 * @param $config['x'] 开始写入时的横坐标 * @param $config['y'] 开始写入时的纵坐标 */ public function __construct($config=null){ if(empty($config)){ return 'must be config'; } $fileArr = explode(".",$config['file']); $config['file_name'] = $fileArr[0]; $config['file_ext'] = $fileArr[1]; $this->config = $config; } /** * PHP实现图片上写入实现文字自动换行 * @param $fontsize 字体大小 * @param $angle 角度 * @param $font 字体路径 * @param $string 要写在图片上的文字 * @param $width 预先设置图片上文字的宽度 * @param $flag 换行时单词不折行 */ public function wordWrap($fontsize,$angle,$font,$string,$width,$flag=true) { $content = ""; if($flag){ $words = explode(" ",$string); foreach ($words as $key=>$value) { $teststr = $content." ".$value; $testbox = imagettfbbox($fontsize, $angle, $font, $teststr); //判断拼接后的字符串是否超过预设的宽度 if(($testbox[2] > $width)) { $content .= "\n"; } $content .= $value." "; } }else{ //将字符串拆分成一个个单字 保存到数组 letter 中 for ($i=0;$i<mb_strlen($string);$i++) { $letter[] = mb_substr($string, $i, 1); } foreach ($letter as $l) { $teststr = $content." ".$l; $testbox = imagettfbbox($fontsize, $angle, $font, $teststr); // 判断拼接后的字符串是否超过预设的宽度 if (($testbox[2] > $width) && ($content !== "")) { $content .= "\n"; } $content .= $l; } } return $content; } /** * 实现写入图片 * @param $text 要写入的文字 * @param $flag 是否直接输出到浏览器，默认是 */ public function writeWordsToImg($text,$flag=true){ if(empty($this->config)){ return 'must be config'; } //获取图片大小 $img_pathWH = getimagesize($this->config['file']); //打开指定的图片文件 $im = imagecreatefrompng($this->config['file']); #设置水印字体颜色 $color = imagecolorallocatealpha($im,0, 0, 255, 75);//蓝色 $have = false; if(stripos($text,"<br/>")!== false){ $have = true; } if($have){ $words_text = explode("<br/>",$text); $words_text[0] = $this->wordWrap($this->config['size'], $this->config['angle'], $this->config['fontfile'], $words_text[0], $this->config['width']); //自动换行处理 $words_text[1] = $this->wordWrap($this->config['size'], $this->config['angle'], $this->config['fontfile'], $words_text[1], $this->config['width']); //自动换行处理 $words_text[2] = $this->wordWrap($this->config['size'], $this->config['angle'], $this->config['fontfile'], $words_text[2], $this->config['width']); //自动换行处理 imagettftext($im, $this->config['size'], $this->config['angle'], $this->config['x'], $this->config['y'], $color, $this->config['fontfile'], $words_text[0]); imagettftext($im, $this->config['size'], $this->config['angle'], $this->config['x'], $this->config['y']+30, $color, $this->config['fontfile'], " ".$words_text[1]); imagettftext($im, $this->config['size'], $this->config['angle'], $img_pathWH[0]/2+70, $img_pathWH[1]-80, $color, $this->config['fontfile'], $words_text[2]); if($flag){ header("content-type:image/png"); imagepng($im); imagedestroy($im); } imagepng($im,$this->config['file_name'].'_1.'.$this->config['file_ext']); imagedestroy($im); } $words_text = $this->wordWrap($this->config['size'], $this->config['angle'], $this->config['fontfile'], $text, $this->config['width']); //自动换行处理 imagettftext($im, $this->config['size'], $this->config['angle'], $this->config['x'], $this->config['y'], $color, $this->config['fontfile'], $words_text); if($flag){ header("content-type:image/png"); imagepng($im); imagedestroy($im); } imagepng($im,$this->config['file_name'].'_1.'.$this->config['file_ext']); imagedestroy($im); } } $text = "Dear Kang<br/>If you can hold something up and put it down, it is called weight lifting;if you can hold something up but can never put it down, it's called bueden bearing. Pitifully, most of people are bearing heavy burdens when they are in love.\n\nBeing nice to someone you dislike doesn't mean you're a hypocritical people. It means you're mature enough to tolerate your dislike towards them.<br/>Mr. Kang"; $data = array( 'file'=>'20171226152410.png', 'size'=>12, 'angle'=>0, 'fontfile'=>'./Font/ChalkboardSE.ttc', 'width'=>270, 'x'=>20, 'y'=>70 ); //使用 $wordsOnImgObj = new wordsOnImg($data); $wordsOnImgObj->writeWordsToImg($text);

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