PHP image upload class and generate thumbnail image

/** * Upload Images */ Class imgupload{ static protected $a; protected $formName; Form name protected $directory; File Upload to Directory protected $maxSize; Maximum file Upload size protected $canUpload; Whether you can upload protected $doUpFile; File name of the upload protected $SM _file; Thumbnail name Private function __construct ($_formname= ' file ', $_directory= './images/uploads/', $_maxsize=1048576) {//1024*1024=1m Initialize parameters $this->formname = $_formname; $this->directory = $_directory; $this->maxsize = $_maxsize; $this->canupload = true; $this->doupfile = "; $this->sm_file = "; } Determine if the picture is in the allowed format static public Function Type ($_formname= ' file ') { $_type = $_files[$_formname][' type ']; Switch ($_type) { Case ' image/gif ': if (self:: $a ==null) Self:: $a = new Imgupload ($_formname); Break Case ' Image/pjpeg ': if (self:: $a ==null) Self:: $a = new Imgupload ($_formname); Break Case ' image/x-png ': if (self:: $a ==null) Self:: $a = new Imgupload ($_formname); Break Default Self:: $a = false; } Return self:: $a; } Get File size Public Function GetSize ($_format= ' K ') { if ($this->canupload) { if (0 = = $_files[$this->formname][' size ') { $this->canupload = false; return $this->canupload; Break } Switch ($_format) { Case ' B ': return $_files[$this->formname][' size '); Break Case ' K ': Return round ($_files[$this->formname][' size ')/1024); Break Case ' M ': Return round ($_files[$this->formname][' size ')/(1024*1024), 2); Break } } } Get file type Public Function Getext () { if ($this->canupload) { $_name = $_files[$this->formname][' name ']; $_namearr = Explode ('. ', $_name); $_count = count ($_namearr)-1; } return $_namearr[$_count]; } Get file name Public Function GetName () { if ($this->canupload) { return $_files[$this->formname][' name ']; } } New file name Public Function NewName () { Return date (' Ymdhis '). Rand (0,9); } Uploading files Public function upload () { if ($this->canupload) { $_getsize = $this->getsize (' B '); if (!$_getsize) { return $_getsize; Break } Else { $_newname = $this->newname (); $_ext = $this->getext (); $_doupload = Move_uploaded_file ($_files[$this->formname][' tmp_name '), $this->directory.$_newname. ".". $_ext); if ($_doupload) { $this->doupfile = $_newname; } return $_doupload; } } } Create a thumbnail image Public function thumb ($_dstchar= ' _m ', $_max_len=320) {//$_dstchar:_m, _s if ($this->canupload && $this->doupfile! = "") { $_ext = $this->getext (); $_srcimage = $this->directory. $this->doupfile. ".". $_ext; Get an array of picture information $_date = getimagesize ($_srcimage, & $info); $SRC _w = $_date[0]; Source Picture Width $SRC _h = $_date[1]; SOURCE Picture High $SRC _max_len = max ($src _w, $src _h); Long Edge $src _min_len = min ($src _w, $src _h); Short Edge $DST _w = "; Target Image width $DST _h = "; Target Picture High Wide-height scaling, longest side not greater than $_max_len if ($src _max_len>$_max_len) { $percent = $src _min_len/$src _max_len; if ($src _w = = $src _max_len) { $DST _w = $_max_len; $DST _h = $percent * $DST _w; } Else { $DST _h = $_max_len; $DST _w = $percent * $DST _h; } } Else { $DST _w = $src _w; $DST _h = $src _h; } The location of the source picture when you create a thumbnail image $SRC _x = "; $src _y = "; Determine if the thumbnail is used for the logo, it will be cut if (' s_ ' = = $_dstchar) { $src _x = $src _w * 0.10; $src _y = $src _h * 0.10; $SRC _w *= 0.8; $SRC _h *= 0.8; } Determine the type of picture and create a new picture Switch ($_date[2]) { Case 1: $src _im = imagecreatefromgif ($_srcimage); Break Case 2: $src _im = Imagecreatefromjpeg ($_srcimage); Break Case 3: $src _im = imagecreatefrompng ($_srcimage); Break Case 8: $src _im = imagecreatefromwbmp ($_srcimage); Break } Create a new image if ($_date[2]==1) {//gif cannot be applied Imagecreatetruecolor $DST _im = imagecreate ($dst _w, $dst _h); }else { $DST _im = Imagecreatetruecolor ($dst _w, $dst _h); } Thumbnail copy of this image $BG = Imagecolorallocate ($dst _im,255,255,0); Imagecopyresized ($dst _im, $src _im, 0, 0, $src _x, $src _y, $dst _w, $dst _h, $src _w, $src _h); antialiasing a picture Imageantialias ($dst _im, true); Switch ($_date[2]) { Case 1: $CR = Imagegif ($dst _im, $this->directory. $this->doupfile.$_dstchar. ".". $_ext, 100); Break Case 2: $CR = imagejpeg ($dst _im, $this->directory. $this->doupfile.$_dstchar. ".". $_ext, 100); Break Case 3://imagepng has a problem, so use imagejpg instead $CR = imagejpeg ($dst _im, $this->directory. $this->doupfile.$_dstchar. ".". $_ext, 100); Break } $CR = imagejpeg ($dst _im, $this->directory.$_dstchar. $this->doupfile, 90); if ($CR) { $this->sm_file = $this->directory. $this->doupfile.$_dstchar. ".". $_ext; return $this->sm_file; }else { return false; } } Imagedestroy ($dst _im); Imagedestroy ($CR); } Get the file name after uploading Public Function Getupfile () { if ($this->doupfile!= ") { $_ext = $this->getext (); return $this->doupfile. ".". $_ext; }else { return false; } } Get the file full path after uploading Public Function Getfilepatch () { if ($this->doupfile!= ") { $_ext = $this->getext (); Return $this->directory. $this->doupfile. ".". $_ext; }else { return false; } } Get thumbnail file full path Public Function Getthumb () { if ($this->sm_file!= ") { return $this->sm_file; }else { return false; } } Get the path to the uploaded file Public Function getdirectory () { if ($this->directory!= ") { return $this->directory; }else { return false; } } } ?> Copy Code

Image upload, PHP

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