PHP Upload Pictures Learning notes and _php tutorials

We must use the #_file variable to upload the file in PHP, and this automatic global variable $_files is supported starting with PHP version 4.1.0. Prior to this, PHP supported $HTTP _post_files arrays starting with version 4.0.0. These arrays will contain all the information about your uploaded files, where we recommend you to use the $_files.

If PHP's set option Register_globals is on, the associated variable name will also be present. Starting with the PHP 4.2.0 version, the default value of Register_globals is set to OFF.

We assume that the name of the File upload field is userfile. Names can be arbitrarily named.

$_files[' UserFile ' [' Name ']
The original name of the client machine file.

$_files[' userfile ' [' type ']
The MIME type of the file requires the browser to provide support for that information, such as "Image/gif".

$_files[' userfile ' [' Size ']
The size of the uploaded file, in bytes.

$_files[' UserFile ' [' Tmp_name ']
Temporary file names stored on the server after the files have been uploaded.

$_files[' userfile ' [' Error ']
The error code associated with the file upload. [' ERROR '] was added in version PHP 4.2.0.

handler function:

Move_uploaded_file ()
(PHP 4 >= 4.0.3, PHP 5)

Move_uploaded_file--Move uploaded files to a new location

Description
BOOL Move_uploaded_file (string filename, string destination)

This function checks and ensures that the file specified by filename is a valid upload file (that is, uploaded via PHP's HTTP POST upload mechanism). If the file is valid, move it to the file specified by destination.

If filename is not a valid upload file, nothing happens and Move_uploaded_file () returns FALSE.

If filename is a legitimate upload file, but for some reason it cannot be moved, nothing happens and Move_uploaded_file () returns FALSE. A warning is also issued.

If the target file already exists, it will be overwritten.

Example:

The code is as follows	Copy Code
if (Move_uploaded_file ($_files["Magfile" ["Tmp_name"], $uploaddir)) { echo "Update ok!"; }

Copy also available (PHP 3, PHP 4, PHP 5)
Copy--Copy files
BOOL Copy (string source, String dest)

Copy the file from source to Dest. Returns TRUE if successful, and FALSE if it fails.

Submit page:

The code is as follows	Copy Code

Processing page:

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if ($_files[' picurl ' [' Size '] > 0) { if (Move_uploaded_file ($_files[' picurl ' [' tmp_name '], $_files[' picurl ' [' name '])) { echo "Image upload success"; } }

Other forms that are not file types can still be received with $_post[' name '.

PHP Upload Image Simple implementation

The code is as follows

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PHP Upload Image Simple implementation if ($_get[' action '] = = ' Upfile ') { $target _path = ' temp_ '. $_files[' photo ' [' name ']; Echo ' uploaded temp file: '. $_files[' photo ' [' tmp_name ']. ' '; Echo ' uploaded target file: '. $target _path. ' '; echo $_server["Script_filename"]. ' '; echo $_server["OS"]. ' '; Test function: Move_uploaded_file You can also use the function: Copy Move_uploaded_file ($_files[' photo '] [' tmp_name '], $target _path); echo "Upload result:"; if (file_exists ($target _path)) { if ($_server["OS"]!= "Windows_NT") { @chmod ($target _path,0604); } Echo ' succeed! '; } else { Echo ' failed! '; } Exit } ?> Registration

The above code only applies to learning, if you want to use on the current server we must write the following

The code is as follows

Copy Code

/****************************************************************************** Parameter description: $max _file_size: Upload file size limit, unit byte $destination _folder: Upload file path $watermark: Whether additional watermark (1 is watermark, the other is not watermark); Instructions for use: 1. Remove the "Extension=php_gd2.dll" line in the php.ini file, because we need to use the GD library; 2. Change Extension_dir = to the directory where your Php_gd2.dll is located; ******************************************************************************/ Upload file Type list $uptypes =array ( ' Image/jpg ', ' Image/jpeg ', ' Image/png ', ' Image/pjpeg ', ' Image/gif ', ' Image/bmp ', ' Image/x-png ' ); $max _file_size=2000000; Upload file size limit, unit byte $destination _folder= "uploadimg/"; Upload file path $watermark = 1; Whether additional watermark (1 is watermark, the other is not watermark); $watertype = 1; Watermark Type (1 for text, 2 for picture) $waterposition = 1; The watermark position (1 is the lower left corner, 2 is the lower right corner, 3 is the upper left corner, 4 is the upper right corner, and 5 is centered); $waterstring = "http://www.bKjia.c0m/"; Watermark String $waterimg = "Xplore.gif"; Watermark Picture $imgpreview = 1; Whether to generate a preview map (1 is generated, others are not generated); $imgpreviewsize =1/2; Thumbnail scale ?> Zwell Picture Uploading Program if ($_server[' request_method '] = = ' POST ') { if (!is_uploaded_file ($_files["Upfile"][tmp_name])) Whether the file exists { echo "Picture does not exist!"; Exit } $file = $_files["Upfile"]; if ($max _file_size < $file ["size"]) Check File size { echo "File too big!"; Exit } if (!in_array ($file ["type"], $uptypes)) Check file types { echo "file type does not match!". $file ["type"]; Exit } if (!file_exists ($destination _folder)) { mkdir ($destination _folder); } $filename = $file ["Tmp_name"]; $image _size = getimagesize ($filename); $pinfo =pathinfo ($file ["name"]); $ftype = $pinfo [' extension ']; $destination = $destination _folder.time (). ".". $ftype; if (file_exists ($destination) && $overwrite! = True) { echo "file with the same name already exists"; Exit } if (!move_uploaded_file ($filename, $destination)) { echo "Error moving File"; Exit } $pinfo =pathinfo ($destination); $fname = $pinfo [basename]; echo "has been successfully uploaded File name: ". $destination _folder. $fname." "; echo "width:". $image _size[0]; echo "Length:". $image _size[1]; echo " Size: ". $file [" Size "]." bytes "; if ($watermark ==1) { $iinfo =getimagesize ($destination, $iinfo); $nimage =imagecreatetruecolor ($image _size[0], $image _size[1]); $white =imagecolorallocate ($nimage, 255,255,255); $black =imagecolorallocate ($nimage, 0,0,0); $red =imagecolorallocate ($nimage, 255,0,0); Imagefill ($nimage, 0,0, $white); Switch ($iinfo [2]) { Case 1: $simage =imagecreatefromgif ($destination); Break Case 2: $simage =imagecreatefromjpeg ($destination); Break Case 3: $simage =imagecreatefrompng ($destination); Break Case 6: $simage =imagecreatefromwbmp ($destination); Break Default Die ("Unsupported file type"); Exit } Imagecopy ($nimage, $simage, 0,0,0,0, $image _size[0], $image _size[1]); Imagefilledrectangle ($nimage, 1, $image _size[1]-15,80, $image _size[1], $white); Switch ($watertype) { Case 1://Add watermark String Imagestring ($nimage, 2,3, $image _size[1]-15, $waterstring, $black); Break Case 2://Add watermark Picture $simage 1 =imagecreatefromgif ("Xplore.gif"); Imagecopy ($nimage, $simage 1,0,0,0,0,85,15); Imagedestroy ($simage 1); Break } Switch ($iinfo [2]) { Case 1: Imagegif ($nimage, $destination); Imagejpeg ($nimage, $destination); Break Case 2: Imagejpeg ($nimage, $destination); Break Case 3: Imagepng ($nimage, $destination); Break Case 6: Imagewbmp ($nimage, $destination); Imagejpeg ($nimage, $destination); Break } Overwrite the original upload file Imagedestroy ($nimage); Imagedestroy ($simage); } if ($imgpreview ==1) { echo " Picture preview: "; echo "echo" alt= "Picture preview: R filename:". $destination. " R upload time: ">"; } } ?>

http://www.bkjia.com/PHPjc/628871.html www.bkjia.com true http://www.bkjia.com/PHPjc/628871.html techarticle We must use the #_file variable to upload the file in PHP, and this automatic global variable $_files is supported starting with PHP version 4.1.0. Before that, starting with version 4.0.0, PHP supports ...

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