How PHP responds to post requests to upload files

This article describes a PHP response to a POST request Uploading FilesThe method. Share to everyone for your reference, as follows:

function Send_file ($url, $post = ', $file = ') {$eol = "\ r \ n";  $mime _boundary = MD5 (time ());  $data = ";  $confirmation = ";  Date_default_timezone_set ("Asia/shanghai");  $time = Date ("y-m-d h:i:s");  $post ["filename"] = $file [filename];    foreach ($post as $key = = $value) {$data. = '--'. $mime _boundary. $eol; $data. = ' Content-disposition:form-data;    '; $data. = "Name=". $key. $eol.    $eol; $data. = $value.  $eol; } $data. = '--'. $mime _boundary.  $eol; $data. = ' Content-disposition:form-data; Name= '. $file [name]. '; Filename= '. $file [filename].  $eol; $data. = ' Content-type:text/plain '.  $eol; $data. = ' Content-transfer-encoding:binary '. $eol.  $eol; $data. = $file [Filedata].  $eol; $data. = "--". $mime _boundary. "--" . $eol.  $eol;  $params = Array (' http ' = = Array (' method ' = ' + ' POST ', ' header ' = ' content-type:multipart/form-data;boundary= '). $mime _boundary.  $eol, ' content ' = $data)); $ctx = Stream_contexT_create ($params);  $response = file_get_contents ($url, File_text, $ctx); return $response;}

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