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高手教你PHP上传多张图片_PHP教程

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发布： 2016-07-15 13:27:17
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学习PHP时，你可能会遇到PHP上传多张图片问题，这里将介绍PHP上传多张图片问题的解决方法，在这里拿出来和大家分享一下。单张的图片上传是不复杂的，这里涉及到PHP上传多张图片和对图片格式的校验，保证上传的一定是图片，防止上传其他文件到服务器。

基本实现算法是使用数组的形式，把所有的图片提交个一个数组，对数组的元素进行一个个的处理。PHP其实不过是Web服务器的一个模块功能，所以首先要保证Web服务器的安全。当然Web服务器要安全又必须是先保证系统安全，这样就扯远了，无穷无尽。PHP可以和各种Web服务器结合，这里也只讨论Apache。非常建议以chroot方式安装启动Apache，这样即使Apache和PHP及其脚本出现漏洞，受影响的也只有这个禁锢的系统，不会危害实际系统。以下为引用的内容：
<ol class="dp-xml">
<li class="alt"><span><span class="tag"></span><span class="tag-name">php</span><span> </span></span></li>
<li class=""><span> </span></li>
<li class="alt"><span>//图片目录  </span></li>
<li class="">
<span>$</span><span class="attribute">img_dir</span><span>=</span><span class="attribute-value">"../upload/"</span><span>;  </span>
</li>
<li class="alt"><span>//……html显示上传界面  </span></li>
<li class=""><span> </span></li>
<li class="alt"><span>/*图片上传处理*/  </span></li>
<li class=""><span>//把图片传到服务器  </span></li>
<li class="alt"><span>//初始化变量  </span></li>
<li class=""><span> </span></li>
<li class="alt">
<span>$</span><span class="attribute">uploaded</span><span>=</span><span class="attribute-value">0</span><span>;  </span>
</li>
<li class="">
<span>$</span><span class="attribute">unuploaded</span><span>=</span><span class="attribute-value">0</span><span>;  </span>
</li>
<li class="alt"><span> </span></li>
<li class=""><span>//只允许五张图片上传  </span></li>
<li class="alt"><span> </span></li>
<li class="">
<span>for($</span><span class="attribute">i</span><span>=</span><span class="attribute-value">0</span><span>;$i</span><span class="tag"><span>=5;$i++)  </span></span>
</li>
<li class="alt"><span>{  </span></li>
<li class=""><span>//获取当前图片的信息  </span></li>
<li class="alt">
<span>$</span><span class="attribute">is_file</span><span>=$_FILES['imgfile']['name'][$i];  </span>
</li>
<li class=""><span>//如果当前图片不为空  </span></li>
<li class="alt"><span>if(!empty($is_file))  </span></li>
<li class=""><span>{  </span></li>
<li class="alt"><span>//把当前图片的信息存储到变量里  </span></li>
<li class=""><span>$result[$i]="  </span></li>
<li class="alt">
<span></span><span class="tag"><span class="attribute">trclass</span><span class="tag-name">trclass</span><span>=</span><span class="attribute-value">td2align</span><span>=center</span><span class="tag">></span><span> </span></span>
</li>
<li class="">
<span></span><span class="tag"><span class="tag-name">td</span><span class="tag">></span><span>".$_FILES['imgfile']['name'][$i]."</span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span>
</li>
<li class="alt">
<span></span><span class="tag"><span class="tag-name">td</span><span class="tag">></span><span>".round($_FILES['imgfile']['size'][$i]/1024,2)."K</span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span>
</li>
<li class="">
<span></span><span class="tag"><span class="tag-name">td</span><span class="tag">></span><span>".$_FILES['imgfile']['type'][$i]."</span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span>
</li>
<li class="alt">
<span></span><span class="tag"><span class="tag-name">td</span><span class="tag">></span><span>";  </span></span>
</li>
<li class=""><span> </span></li>
<li class="alt"><span>//判断上传的图片的类型是不是jpg,gif,png,bmp中的一种，同时判断是否上传成功  </span></li>
<li class=""><span>if(  </span></li>
<li class="alt"><span> </span></li>
<li class=""><span>$_FILES['imgfile']['type'][$i]=="image/pjpeg"||  </span></li>
<li class="alt"><span>$_FILES['imgfile']['type'][$i]=="image/gif"||  </span></li>
<li class=""><span>$_FILES['imgfile']['type'][$i]=="image/x-png"||  </span></li>
<li class="alt"><span>$_FILES['imgfile']['type'][$i]=="image/bmp"  </span></li>
<li class=""><span>)  </span></li>
<li class="alt"><span>{  </span></li>
<li class=""><span>//如果上传的文件没有在服务器上存在  </span></li>
<li class="alt"><span>if(!file_exists($img_dir.$_FILES['imgfile']['name'][$i]))  </span></li>
<li class=""><span>{  </span></li>
<li class="alt"><span>//把图片文件从临时文件夹中转移到我们指定上传的目录中  </span></li>
<li class=""><span>move_uploaded_file($_FILES['imgfile']['tmp_name'][$i],  </span></li>
<li class="alt"><span>$img_dir.$_FILES['imgfile']['name'][$i]);  </span></li>
<li class="">
<span>$result[$i]</span><span class="attribute">.</span><span>=</span><span class="attribute-value">"成功"</span><span>;  </span>
</li>
<li class="alt"><span>$uploaded++;  </span></li>
<li class=""><span>}  </span></li>
<li class="alt"><span>else//如果文件已经在服务器上存在  </span></li>
<li class=""><span>{  </span></li>
<li class="alt">
<span>$result[$i]</span><span class="attribute">.</span><span>=</span><span class="attribute-value">"<fontcolor>文件已存在"</fontcolor></span><span>;  </span>
</li>
<li class=""><span>$unuploaded++;  </span></li>
<li class="alt"><span>continue;  </span></li>
<li class=""><span>}  </span></li>
<li class="alt"><span>}  </span></li>
<li class=""><span>else  </span></li>
<li class="alt"><span>{  </span></li>
<li class="">
<span>$result[$i]</span><span class="attribute">.</span><span>=</span><span class="attribute-value">"<fontcolor>失败"</fontcolor></span><span>;  </span>
</li>
<li class="alt"><span>$unuploaded++;  </span></li>
<li class=""><span>}  </span></li>
<li class="alt">
<span>$result[$i]</span><span class="attribute">.</span><span>=</span><span class="attribute-value">""</span><span>;  </span>
</li>
<li class=""><span>}//endif  </span></li>
<li class="alt"><span>}//endfor  </span></li>
<li class=""><span> </span></li>
<li class="alt"><span> </span></li>
<li class=""><span>//如果没有选择任何图片  </span></li>
<li class="alt"><span>if(empty($result))  </span></li>
<li class=""><span>{  </span></li>
<li class="alt">
<span>prompt_msg("错误信息","没有选择任何图片。","返回上一步","uploadimg.php?</span><span class="attribute">action</span><span>=</span><span class="attribute-value">upload</span><span>");  </span>
</li>
<li class=""><span>exit();  </span></li>
<li class="alt"><span>}  </span></li>
<li class=""><span> </span></li>
<li class="alt"><span>//显示所有上传后的结果  </span></li>
<li class="">
<span>echo"</span><span class="tag"><span class="attribute">tablecellpadding</span><span class="tag-name">tablecellpadding</span><span>=</span><span class="attribute-value">4cellspacing</span><span>=</span><span class="attribute">1border</span><span>=</span><span class="attribute-value">0class</span><span>=</span><span class="attribute">tablewidth</span><span>=</span><span class="attribute-value">400align</span><span>=left</span><span class="tag">></span><span> </span></span>
</li>
<li class="alt">
<span></span><span class="tag"><span class="attribute">trclass</span><span class="tag-name">trclass</span><span>=</span><span class="attribute-value">navialign</span><span>=center</span><span class="tag">></span><span> </span></span>
</li>
<li class="">
<span></span><span class="tag"><span class="tag-name">td</span><span class="tag">></span><span>文件名</span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span>
</li>
<li class="alt">
<span></span><span class="tag"><span class="tag-name">td</span><span class="tag">></span><span>大小</span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span>
</li>
<li class="">
<span></span><span class="tag"><span class="tag-name">td</span><span class="tag">></span><span>类型</span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span>
</li>
<li class="alt">
<span></span><span class="tag"><span class="tag-name">td</span><span class="tag">></span><span>上传结果</span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span>
</li>
<li class="">
<span></span><span class="tag"></span><span class="tag-name">tr</span><span class="tag">></span><span> </span>
</li>
<li class="alt"><span>";  </span></li>
<li class=""><span> </span></li>
<li class="alt"><span>foreach($resultas$value)  </span></li>
<li class=""><span>{  </span></li>
<li class="alt"><span>echo$value;  </span></li>
<li class=""><span>}  </span></li>
<li class="alt"><span> </span></li>
<li class="">
<span>echo"</span><span class="tag"><span class="attribute">trclass</span><span class="tag-name">trclass</span><span>=</span><span class="attribute-value">td1</span><span class="tag">></span><span> </span></span>
</li>
<li class="alt">
<span></span><span class="tag"><span class="attribute">tdcolspan</span><span class="tag-name">tdcolspan</span><span>=</span><span class="attribute-value">4</span><span class="tag">></span><span>共上传".($uploaded+$unuploaded).",成功:$uploaded,失败:</span><span class="tag"><span class="attribute">fontcolor</span><span class="tag-name">fontcolor</span><span>=</span><span class="attribute-value">red</span><span class="tag">></span><span>$unuploaded</span><span class="tag"></span><span class="tag-name">font</span><span class="tag">></span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span><li class="">
<span></span><span class="tag"></span><span class="tag-name">tr</span><span class="tag">></span><span> </span>
</li></span>
</li>
<li class="alt">
<span></span><span class="tag"><span class="attribute">trclass</span><span class="tag-name">trclass</span><span>=</span><span class="attribute-value">navi</span><span class="tag">></span><span> </span></span>
</li>
<li class="">
<span></span><span class="tag"><span class="attribute">tdcolspan</span><span class="tag-name">tdcolspan</span><span>=</span><span class="attribute-value">4align</span><span>=center</span><span class="tag">></span><span>[</span><span class="tag"><span class="attribute">ahref</span><span class="tag-name">ahref</span><span>='uploadimg.php?action=upload'</span><span class="attribute-value">title</span><span>='继续上传'</span><span class="tag">></span><span>继续上传</span><span class="tag"></span><span class="tag-name">a</span><span class="tag">></span><span>]<br>    [</span><span class="tag"><span class="attribute">ahref</span><span class="tag-name">ahref</span><span>='image.php'</span><span class="attribute-value">title</span><span>='浏览图片'</span><span class="tag">></span><span>浏览图片</span><span class="tag"></span><span class="tag-name">a</span><span class="tag">></span><span>]</span><span class="tag"></span><span class="tag-name">td</span><span class="tag">></span><span> </span></span><li class="alt">
<span></span><span class="tag"></span><span class="tag-name">tr</span><span class="tag">></span><span> </span>
</li></span><li class="">
<span></span><span class="tag"></span><span class="tag-name">table</span><span class="tag">></span><span> </span>
</li></span>
</li>
<li class="alt"><span>";  </span></li>
<li class="">
<span></span><span class="tag">?></span><span> </span>
</li>
</ol>
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