<code> function onSelectPhoto(files) { file_obj = files[0]; if (use_general_upload) { return; } var filesize = file_obj.size 5242880; var allow_type = '|.jpg|jpeg|.png|.gif|'; var ext_name = '|' + file_obj.name.toLowerCase().substr(file_obj.name.length - 4) + '|'; var filetype = (allow_type.indexOf(ext_name) == -1 && file_obj.name.indexOf(".") > 0); var reader = new FileReader(); reader.onload = function (e) { if (e.target.result.substr(0, 11) == 'data:base64') { $("#preview_img").attr('src', "data:application/octet-stream;" + e.target.result.substr(e.target.result.indexOf("base64,"))); } else { $("#preview_img").attr('src', e.target.result); } } if (filesize) { file_obj = false; showTextTime("您选择的文件大于5MB，请选择小于5MB的照片", 3000); return false; } if (filetype) { file_obj = false; showTextTime("您选择的文件格式有误，应为JPG、PNG或GIF类型的文件", 3000); return false; } file_name = file_obj.name; reader.readAsDataURL(file_obj); // // alert(reader); }</code>
<code>图片上传处理代码</code>
<code> function upload_photo() { if (file_obj == false) { showTextTime("请先从手机中选取要上传的照片", 2000); return false; } if (uploading) { showTextTime("照片正在上传中，请稍候...", 2000); return false; } uploading = true; showLoading(loading_src, "照片上传中...", 0); if (use_general_upload) { document.forms[0].submit(); } else { var ui = $("#upload_ifr"); var ui = ui[0]; ui.contentWindow.upload_photo(); } return false; } </code>
<code>function upload_photo() { var xhr = new XMLHttpRequest(); if (xhr.upload) { xhr.onreadystatechange = function(e) { window.top.callbackHandler(e, xhr); }; xhr.upload.onprogress=function(e){ if(e.lengthComputable){ var percent =(e.loaded / e.total *100|0)+"%"; } } var formData = new FormData(); formData.append('files', window.top.file_obj);// alert(formData); xhr.open("POST", 'upload_file.php', true); xhr.send(formData); } }</code>
这里我应该怎么在upload_file.php获取到传递过来的formData
6来源gaodaimacom搞#^代%!码网搞gaodaima代码
回复内容：
<code> function onSelectPhoto(files) { file_obj = files[0]; if (use_general_upload) { return; } var filesize = file_obj.size 5242880; var allow_type = '|.jpg|jpeg|.png|.gif|'; var ext_name = '|' + file_obj.name.toLowerCase().substr(file_obj.name.length - 4) + '|'; var filetype = (allow_type.indexOf(ext_name) == -1 && file_obj.name.indexOf(".") > 0); var reader = new FileReader(); reader.onload = function (e) { if (e.target.result.substr(0, 11) == 'data:base64') { $("#preview_img").attr('src', "data:application/octet-stream;" + e.target.result.substr(e.target.result.indexOf("base64,"))); } else { $("#preview_img").attr('src', e.target.result); } } if (filesize) { file_obj = false; showTextTime("您选择的文件大于5MB，请选择小于5MB的照片", 3000); return false; } if (filetype) { file_obj = false; showTextTime("您选择的文件格式有误，应为JPG、PNG或GIF类型的文件", 3000); return false; } file_name = file_obj.name; reader.readAsDataURL(file_obj); // // alert(reader); }</code>
<code>图片上传处理代码</code>
<code> function upload_photo() { if (file_obj == false) { showTextTime("请先从手机中选取要上传的照片", 2000); return false; } if (uploading) { showTextTime("照片正在上传中，请稍候...", 2000); return false; } uploading = true; showLoading(loading_src, "照片上传中...", 0); if (use_general_upload) { document.forms[0].submit(); } else { var ui = $("#upload_ifr"); var ui = ui[0]; ui.contentWindow.upload_photo(); } return false; } </code>
<code>function upload_photo() { var xhr = new XMLHttpRequest(); if (xhr.upload) { xhr.onreadystatechange = function(e) { window.top.callbackHandler(e, xhr); }; xhr.upload.onprogress=function(e){ if(e.lengthComputable){ var percent =(e.loaded / e.total *100|0)+"%"; } } var formData = new FormData(); formData.append('files', window.top.file_obj);// alert(formData); xhr.open("POST", 'upload_file.php', true); xhr.send(formData); } }</code>
这里我应该怎么在upload_file.php获取到传递过来的formData
`
<code>$smeta = $_POST['smeta']; if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $smeta, $result)) {//base64上传 $data = base64_decode(str_replace($result[1], '', $smeta)); $dataname = './Uploads/' . uniqid() . '.' . $result[2]; if (file_put_contents($dataname, $data)) { $this->ajaxoutput($dataname); //返回数据结构自行封装 }else{ $this->ajaxerror('上传出错'); }</code>
}`
base64_decode()
为什么不直接上传图片,这样做费力不讨好. 如果用base64提交,可以把他当字符串post, 后台从$_POST里取出就好了.
先正则提取图片后缀和数据流，再对数据流进行base64_decode
<code>private function decodeFile($base64_url) { preg_match('/^data:image\/(\w+);base64/', $base64_url, $out); $type = $out[1]; $type_param = 'data:image/' . $type . ';base64,'; $fileStream = str_replace($type_param, '', $base64_url); $fileStream = base64_decode($fileStream); return array( 'type' => $type, 'fileStream' => $fileStream ); }</code>
<code> public function base64img() { if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $_POST['pic'], $result)) { $new_file = "Uploads/Picture/" . uniqid() . '.png'; file_put_contents($new_file, base64_decode(str_replace($result[1], '', $_POST['pic']))); return $new_file; } }</code>
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转载请注明原文链接：php如何获取ajax提交过来的经过base64处理后的图片
转载请注明原文链接：php如何获取ajax提交过来的经过base64处理后的图片
