利用php给图片添加文字水印--面向对象与面向过程俩种方法的实现
1: 面向过程的编写方法
<span style="color: #008000;">//</span><span style="color: #008000;">指定图片路径</span><span style="color: #800080;">$src</span> = '001.png'<span style="color: #000000;">;</span><span style="color: #008000;">//</span><span style="color: #008000;">获取图片信息</span><span style="color: #800080;">$info</span> = <span style="color: #008080;">getimagesize</span>(<span style="color: #800080;">$src</span><span style="color: #000000;">);</span><span style="color: #008000;">//</span><span style="color: #008000;">获取图片扩展名</span><span style="color: #800080;">$type</span> = image_type_to_extension(<span style="color: #800080;">$info</span>[2],<span style="color: #0000ff;">false</span><span style="color: #000000;">);</span><span style="color: #008000;">//</span><span style="color: #008000;">动态的把图片导入内存中</span><span style="color: #800080;">$fun</span> = "imagecreatefrom{<span style="color: #800080;">$type</span>}"<span style="color: #000000;">;</span><span style="color: #800080;">$image</span> = <span style="color: #800080;">$fun</span>('001.png'<span style="color: #000000;">);</span><span style="color: #008000;">//</span><span style="color: #008000;">指定字体颜色</span><span style="color: #800080;">$col</span> = imagecolorallocatealpha(<span style="color: #800080;">$image</span>,255,255,255,50<span style="color: #000000;">);</span><span style="color: #008000;">//</span><span style="color: #008000;">指定字体内容</span><span style="color: #800080;">$content</span> = 'helloworld'<span style="color: #000000;">;</span><span style="color: #008000;">//</span><span style="color: #008000;">给图片添加文字</span>imagestring(<span style="color: #800080;">$image</span>,5,20,30,<span style="color: #800080;">$content</span>,<span style="color: #800080;">$col</span><span style="color: #000000;">);</span><span style="color: #008000;">//</span><span style="color: #008000;">指定输入类型</span><span style="color: #008080;">header</span>('Content-type:'.<span style="color: #800080;">$info</span>['mime'<span style="color: #000000;">]);</span><span style="color: #008000;">//</span><span style="color: #008000;">动态的输出图片到浏览器中</span><span style="color: #800080;">$func</span> = "image{<span style="color: #800080;">$type</span>}"<span style="color: #000000;">;</span><span style="color: #800080;">$func</span>(<span style="color: #800080;">$image</span><span style="color: #000000;">);</span><span style="color: #008000;">//</span><span style="color: #008000;">销毁图片</span>imagedestroy(<span style="color: #800080;">$image</span>);
2:面向对象的实现方法
<span style="color: #0000ff;">class</span><span style="color: #000000;"> Image_class { </span><span style="color: #0000ff;">private</span> <span style="color: #800080;">$image</span><span style="color: #000000;">; </span><span style="color: #0000ff;">private</span> <span style="color: #800080;">$info</span><span style="color: #000000;">; </span><span style="color: #008000;">/*</span><span style="color: #008000;">* * @param $src:图片路径 * 加载图片到内存中 </span><span style="color: #008000;">*/</span> <span style="color: #0000ff;">function</span> __construct(<span style="color: #800080;">$src</span><span style="color: #000000;">){ </span><span style="color: #800080;">$info</span> = <span style="color: #008080;">getimagesize</span>(<span style="color: #800080;">$src</span><span style="color: #000000;">); </span><span style="color: #800080;">$type</span> = image_type_to_extension(<span style="color: #800080;">$info</span>[2],<span style="color: #0000ff;">false</span><span style="color: #000000;">); </span><span style="color: #800080;">$this</span> -> info =<span style="color: #800080;">$info</span><span style="color: #000000;">; </span><span style="color: #800080;">$this</span>->info['type'] = <span style="color: #800080;">$type</span><span style="color: #000000;">; </span><span style="color: #800080;">$fun</span> = "imagecreatefrom" .<span style="color: #800080;">$type</span><span style="color: #000000;">; </span><span style="color: #800080;">$this</span> -> image = <span style="color: #800080;">$fun</span>(<span style="color: #800080;">$src</span><span style="color: #000000;">); } </span><span style="color: #008000;">/*</span><span style="color: #008000;">* * @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 $text: 想要添加的内容 * 操作内存中的图片,给图片添加文字水印 </span><span style="color: #008000;">*/</span> <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span> fontMark(<span style="color: #800080;">$fontsize</span>,<span style="color: #800080;">$x</span>,<span style="color: #800080;">$y</span>,<span style="color: #800080;">$color</span>,<span style="color: #800080;">$text</span><span style="color: #000000;">){ </span><span style="color: #800080;">$col</span> = imagecolorallocatealpha(<span style="color: #800080;">$this</span>->image,<span style="color: #800080;">$color</span>[0],<span style="color: #800080;">$color</span>[1],<span style="color: #800080;">$color</span>[2],<span style="color: #800080;">$color</span>[3<span style="color: #000000;">]); imagestring(</span><span style="color: #800080;">$this</span>->image,<span style="color: #800080;">$fontsize</span>,<span style="color: #800080;">$x</span>,<span style="color: #800080;">$y</span>,<span style="color: #800080;">$text</span>,<span style="color: #800080;">$col</span><span style="color: #000000;">); } </span><span style="color: #008000;">/*</span><span style="color: #008000;"> * 输出图片到浏览器中 </span><span style="color: #008000;">*/</span> <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> show(){ </span><span style="color: #008080;">header</span>('content-type:' . <span style="color: #800080;">$this</span> -> info['mime'<span style="color: #000000;">]); </span><span style="color: #800080;">$fun</span>='image' . <span style="color: #800080;">$this</span>->info['type'<span style="color: #000000;">]; </span><span style="color: #800080;">$fun</span>(<span style="color: #800080;">$this</span>-><span style="color: #000000;">image); } </span><span style="color: #008000;">/*</span><span style="color: #008000;">* * 销毁图片 </span><span style="color: #008000;">*/</span> <span style="color: #0000ff;">function</span><span style="color: #000000;"> __destruct(){ imagedestroy(</span><span style="color: #800080;">$this</span>-><span style="color: #000000;">image); }}</span><span style="color: #008000;">//</span><span style="color: #008000;">对类的调用</span><span style="color: #800080;">$obj</span> = <span style="color: #0000ff;">new</span> Image_class('001.png'<span style="color: #000000;">);</span><span style="color: #800080;">$obj</span>->fontMark(20,20,30,<span style="color: #0000ff;">array</span>(255,255,255,60),'hello'<span style="color: #000000;">);</span><span style="color: #800080;">$obj</span>->show();
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