Heim >Backend-Entwicklung >PHP-Tutorial >Verwendung von PHP zum Hinzufügen von Textwasserzeichen zu Bildern – Implementierung objektorientierter und prozessorientierter Methoden
1: Prozessorientierte Schreibmethode
<span>//</span><span>指定图片路径</span><span>$src</span> = '001.png'<span>; </span><span>//</span><span>获取图片信息</span><span>$info</span> = <span>getimagesize</span>(<span>$src</span><span>); </span><span>//</span><span>获取图片扩展名</span><span>$type</span> = image_type_to_extension(<span>$info</span>[2],<span>false</span><span>); </span><span>//</span><span>动态的把图片导入内存中</span><span>$fun</span> = "imagecreatefrom{<span>$type</span>}"<span>; </span><span>$image</span> = <span>$fun</span>('001.png'<span>); </span><span>//</span><span>指定字体颜色</span><span>$col</span> = imagecolorallocatealpha(<span>$image</span>,255,255,255,50<span>); </span><span>//</span><span>指定字体内容</span><span>$content</span> = 'helloworld'<span>; </span><span>//</span><span>给图片添加文字</span>imagestring(<span>$image</span>,5,20,30,<span>$content</span>,<span>$col</span><span>); </span><span>//</span><span>指定输入类型</span><span>header</span>('Content-type:'.<span>$info</span>['mime'<span>]); </span><span>//</span><span>动态的输出图片到浏览器中</span><span>$func</span> = "image{<span>$type</span>}"<span>; </span><span>$func</span>(<span>$image</span><span>); </span><span>//</span><span>销毁图片</span>imagedestroy(<span>$image</span>);
2: Objektorientierte Implementierungsmethode
<span>class</span><span> Image_class { </span><span>private</span><span>$image</span><span>; </span><span>private</span><span>$info</span><span>; </span><span>/*</span><span>* * @param $src:图片路径 * 加载图片到内存中 </span><span>*/</span><span>function</span> __construct(<span>$src</span><span>){ </span><span>$info</span> = <span>getimagesize</span>(<span>$src</span><span>); </span><span>$type</span> = image_type_to_extension(<span>$info</span>[2],<span>false</span><span>); </span><span>$this</span> -> info =<span>$info</span><span>; </span><span>$this</span>->info['type'] = <span>$type</span><span>; </span><span>$fun</span> = "imagecreatefrom" .<span>$type</span><span>; </span><span>$this</span> -> image = <span>$fun</span>(<span>$src</span><span>); } </span><span>/*</span><span>* * @param $fontsize: 字体大小 * @param $x: 字体在图片中的x位置 * @param $y: 字体在图片中的y位置 * @param $color: 字体的颜色是一个包含rgba的数组 * @param $text: 想要添加的内容 * 操作内存中的图片,给图片添加文字水印 </span><span>*/</span><span>public</span><span>function</span> fontMark(<span>$fontsize</span>,<span>$x</span>,<span>$y</span>,<span>$color</span>,<span>$text</span><span>){ </span><span>$col</span> = imagecolorallocatealpha(<span>$this</span>->image,<span>$color</span>[0],<span>$color</span>[1],<span>$color</span>[2],<span>$color</span>[3<span>]); imagestring(</span><span>$this</span>->image,<span>$fontsize</span>,<span>$x</span>,<span>$y</span>,<span>$text</span>,<span>$col</span><span>); } </span><span>/*</span><span> * 输出图片到浏览器中 </span><span>*/</span><span>public</span><span>function</span><span> show(){ </span><span>header</span>('content-type:' . <span>$this</span> -> info['mime'<span>]); </span><span>$fun</span>='image' . <span>$this</span>->info['type'<span>]; </span><span>$fun</span>(<span>$this</span>-><span>image); } </span><span>/*</span><span>* * 销毁图片 </span><span>*/</span><span>function</span><span> __destruct(){ imagedestroy(</span><span>$this</span>-><span>image); } } </span><span>//</span><span>对类的调用</span><span>$obj</span> = <span>new</span> Image_class('001.png'<span>); </span><span>$obj</span>->fontMark(20,20,30,<span>array</span>(255,255,255,60),'hello'<span>); </span><span>$obj</span>->show();
Das Obige stellt die Verwendung von PHP zum Hinzufügen von Textwasserzeichen zu Bildern vor – die Implementierung von zwei Methoden, objektorientiert und prozessorientiert, einschließlich Aspekten des Inhalts. Ich hoffe, dass es für Freunde hilfreich sein wird, die an PHP-Tutorials interessiert sind.