PHP saves pictures as picture class instances with different size pictures _php tips

This article illustrates how PHP saves pictures as different sizes of picture classes. Share to everyone for your reference. Specifically as follows:

Picture processing class. Imagecls.php is as follows:

<?php/** Image Processing class */class Imagecls {/** * file information */var $file = array ();
  /** * Save Directory/var $dir = ';
  /** * ERROR code * * var $error _code = 0;
  /** * File Upload max kb/var $max _size =-1; function Es_imagecls () {} private Function Checksize ($size) {return! $size > $this->max_size) | |
  ( -1 = = $this->max_size); /** * Processing uploaded files * @param array $file uploaded files * @param string $dir saved directory * @return bool/function init ($f ile, $dir = ' temp ') {if (!is_array ($file) | | | empty ($file) | |! $this->isuploadfile ($file [' tmp_name ']) | | Trim ($fil e[' name '] = = ' | |
      $file [' size '] = = 0) {$this->file = array ();
      $this->error_code =-1;
    return false;
      else {$file [' size '] = intval ($file [' size ']);
      $file [' name '] = Trim ($file [' name ']);
      $file [' thumb '] = ';
      $file [' ext '] = $this->fileext ($file [' name ']); $file [' name '] = Htmlspecialchars ($file [' name '], ent_quotes);
      $file [' is_image '] = $this->isimageext ($file [' ext ']);
      $file [' file_dir '] = $this->gettargetdir ($dir);
      $file [' prefix '] = MD5 (Microtime (TRUE)). Rand (10,99); $file [' target '] = './public/'. $file [' File_dir ']. ' /'. $file [' prefix ']. JPG '; Relative $file [' local_target '] = App_root_path. public/". $file [' File_dir ']. ' /'. $file [' prefix ']. JPG ';
      Physical $this->file = & $file;
      $this->error_code = 0;
    return true; }/** * Save file * @return bool/function Save () {if (Empty ($this->file) | | empty ($this->file['
    Tmp_name ']) $this->error_code =-101;
    ElseIf (! $this->checksize ($this->file[' size ')) $this->error_code =-105;
    ElseIf (! $this->file[' is_image ') $this->error_code =-102; ElseIf (! $this->savefile ($this->file[' tmp_name '], $this->file[' Local_target ')) $this->error_code =-
    103; ElseIf ($this->file[' is_image '] && (! $this->file[' image_inFo '] = $this->getimageinfo ($this->file[' Local_target '], true)) {$this->error_code =-104;
    @unlink ($this->file[' local_target '));
      else {$this->error_code = 0;
    return true;
  return false;
  /** * Get error code * @return Number/Function error () {return $this->error_code; /** * Gets the file name extension * @return string/function Fileext ($file _name) {return addslashes strtolower (
  STRRCHR ($file _name, '. '), 1, 10));  /** * According to the extension to determine whether the file is an image * @param string $ext extension * @return bool/function Isimageext ($ext) {static
    $img _ext = array (' jpg ', ' jpeg ', ' PNG ', ' BMP ', ' gif ', ' giff '); Return In_array ($ext, $img _ext)?
  1:0;  /** * Get image information * @param string $target file path * @return Mixed/function Getimageinfo ($target) {$ext
    = Es_imagecls::fileext ($target);
    $is _image = Es_imagecls::isimageext ($ext);
    if (! $is _image) return false; Elseif (!is_readable ($target)) return false; ElseIf ($image _info = @getimagesize ($target)) {list ($width, $height, $type) =!empty ($image _info)? $image _info
      : Array (', ', ', ');
      $size = $width * $height;
      if ($is _image &&!in_array ($type, Array (1,2,3,6,13)) return false;
      $image _info[' type '] = Strtolower (substr (image_type_to_extension ($image _info[2)), 1);
    return $image _info;
  else return false; /** * Obtain whether the upload file is allowed * @param string $source file path * @return bool/function Isuploadfile ($source) {R Eturn $source && ($source!= ' None ') && (Is_uploaded_file ($source) | | is_uploaded_file (str_replace (' \\\
  \ ', ' \ \ ', $source))); /** * Gets the saved path * @param string $dir The specified save directory * @return string/function Gettargetdir ($dir) {i F (!is_dir (App_root_path.) public/". $dir)) {@mkdir (app_root_path.)
       public/". $dir); @chmod (App_root_path.)
    public/". $dir, 0777); }
    return $dir; /** * Save File * @param string $source source file path * @param string $target directory file path * @return BOOL */Private fun
    Ction SaveFile ($source, $target) {if (!es_imagecls::isuploadfile ($source)) $succeed = false;
    ElseIf (@copy ($source, $target)) $succeed = true;
    ElseIf (function_exists (' move_uploaded_file ') && @move_uploaded_file ($source, $target)) $succeed = true;
    ElseIf (@is_readable ($source) && (@ $fp _s = fopen ($source, ' RB ')) && (@ $fp _t = fopen ($target, ' WB '))
        {while (!feof ($fp _s)) {$s = @fread ($fp _s, 1024 * 512);
      @fwrite ($fp _t, $s);
      } fclose ($fp _s);
      Fclose ($fp _t);
    $succeed = true;
      } if ($succeed) {$this->error_code = 0;
      @chmod ($target, 0644);
    @unlink ($source);
    else {$this->error_code = 0;
  return $succeed; The Public function thumb ($image, $maxWidth =200, $maxHeight =50, $gen = 0, $inTerlace=true, $filepath = ", $is _preview = True) {$info = Es_imagecls::getimageinfo ($image);
      if ($info!== false) {$srcWidth = $info [0];
      $srcHeight = $info [1];
      $type = $info [' type ']; $interlace = $interlace?
      1:0;
      Unset ($info); if ($maxWidth > 0 && $maxHeight > 0) $scale = min ($maxWidth/$srcWidth, $maxHeight/$srcHeight);
      Compute the scaling ratio elseif ($maxWidth = 0) $scale = $maxHeight/$srcHeight;
      ElseIf ($maxHeight = = 0) $scale = $maxWidth/$srcWidth;
      $paths = PathInfo ($image); $paths [' filename '] = Trim (Strtolower ($paths [' basename ']), ".".
      Strtolower ($paths [' extension ']));
      $basefilename = Explode ("_", $paths [' filename ']);
      $basefilename = $basefilename [0]; if (empty ($filepath)) {if ($is _preview) $thumbname = $paths [' dirname ']. ' /'. $basefilename. ' _ '. $maxWidth. ' x '. $maxHeight '.
        JPG '; else $thumbname = $paths [' dirname ']. ' /'. $basefilename. ' O_ '. $maXwidth. ' x '. $maxHeight. '
      JPG ';
      else $thumbname = $filepath;
      $thumburl = Str_replace (App_root_path, './', $thumbname);
        if ($scale >= 1) {//More than the original size is no longer abbreviated $width = $srcWidth;    
        $height = $srcHeight;  if (! $is _preview) {//non-preview mode is written to the original file_put_contents ($thumbname, file_get_contents ($image));
        Write the return array (' URL ' => $thumburl, ' path ' => $thumbname) with the original artwork;
        } else {//thumbnail size $width = (int) ($srcWidth * $scale);
      $height = (int) ($srcHeight * $scale);
        } if ($gen = = 1) {$width = $maxWidth;
      $height = $maxHeight; //Load Original $createFun = ' Imagecreatefrom '. ($type = = ' jpg '?
      JPEG ': $type);
      if (!function_exists ($createFun)) $createFun = ' imagecreatefromjpeg ';
      $SRCIMG = $createFun ($image); Create thumbnails if ($type!= ' gif ' && function_exists (' Imagecreatetruecolor ')) $thumbImg = Imagecreatetruecolor ($width, $height);
      else $thumbImg = Imagecreate ($width, $height);
      $x = 0;
      $y = 0; if ($gen = = 1 && $maxWidth > 0 && $maxHeight > 0) {$resize _ratio = $maxWidth/$maxHeigh
        T
        $SRC _ratio = $srcWidth/$srcHeight;
          if ($src _ratio >= $resize _ratio) {$x = ($srcWidth-($resize _ratio * $srcHeight))/2;
        $width = ($height * $srcWidth)/$srcHeight;
          else {$y = ($srcHeight-((1/$resize _ratio) * $srcWidth))/2;
        $height = ($width * $srcHeight)/$srcWidth; }///Copy Picture if (Function_exists ("imagecopyresampled")) imagecopyresampled ($thumbImg, $srcImg, 0,
      0, $x, $y, $width, $height, $srcWidth, $srcHeight);
      else imagecopyresized ($thumbImg, $srcImg, 0, 0, $x, $y, $width, $height, $srcWidth, $srcHeight); if (' gif ' = = $type | | ' png ' = $type) {$backgrOund_color = Imagecolorallocate ($thumbImg, 0,255,0); Assign a green imagecolortransparent ($THUMBIMG, $background _color); Set to Transparent color, if you comment out the line then output green figure}//Set interlaced scan for JPEG if (' jpg ' = $type | |
      ' jpeg ' = = $type) imageinterlace ($THUMBIMG, $interlace);
      Generate Picture imagejpeg ($THUMBIMG, $thumbname, 100);
      Imagedestroy ($THUMBIMG);
      Imagedestroy ($SRCIMG);
     Return array (' URL ' => $thumburl, ' path ' => $thumbname);
  return false; The Public Function Make_thumb ($SRCIMG, $srcWidth, $srcHeight, $type, $maxWidth =200, $maxHeight =50, $gen = 0) {$interla Ce = $interlace?
      1:0; if ($maxWidth > 0 && $maxHeight > 0) $scale = min ($maxWidth/$srcWidth, $maxHeight/$srcHeight);
      Compute the scaling ratio elseif ($maxWidth = 0) $scale = $maxHeight/$srcHeight;
      ElseIf ($maxHeight = = 0) $scale = $maxWidth/$srcWidth;
        if ($scale >= 1) {//More than the original size is no longer abbreviated $width = $srcWidth;
 $height = $srcHeight;     else {//thumbnail size $width = (int) ($srcWidth * $scale);
      $height = (int) ($srcHeight * $scale);
        } if ($gen = = 1) {$width = $maxWidth;
      $height = $maxHeight; //Create thumbnail if ($type!= ' gif ' && function_exists (' Imagecreatetruecolor ')) $THUMBIMG = Imagecreatet
      Ruecolor ($width, $height);
      else $thumbImg = Imagecreatetruecolor ($width, $height);
      $x = 0;
      $y = 0; if ($gen = = 1 && $maxWidth > 0 && $maxHeight > 0) {$resize _ratio = $maxWidth/$maxHeigh
        T
        $SRC _ratio = $srcWidth/$srcHeight;
          if ($src _ratio >= $resize _ratio) {$x = ($srcWidth-($resize _ratio * $srcHeight))/2;
        $width = ($height * $srcWidth)/$srcHeight;
          else {$y = ($srcHeight-((1/$resize _ratio) * $srcWidth))/2;
        $height = ($width * $srcHeight)/$srcWidth;
   }
      }   Copy Picture if (Function_exists ("imagecopyresampled")) imagecopyresampled ($thumbImg, $srcImg, 0, 0, $x, $y, $w
      Idth, $height, $srcWidth, $srcHeight);
      else imagecopyresized ($thumbImg, $srcImg, 0, 0, $x, $y, $width, $height, $srcWidth, $srcHeight); if (' gif ' = = $type | | ' png ' = = $type) {$background _color = imagecolorallocate ($thumbImg, 255,255,255);//Assign a green IMAGECOLORTRANSP Arent ($THUMBIMG, $background _color); Set to Transparent color, if you comment out the line then output green figure}//Set interlaced scan for JPEG if (' jpg ' = $type | |
      ' jpeg ' = = $type) imageinterlace ($THUMBIMG, $interlace);
  return $THUMBIMG; The Public function water ($source, $water, $alpha =80, $position = "0") {//check that the file exists if (!file_exists ($source) | |!
    File_exists ($water)) return false;
    Picture information $sInfo = Es_imagecls::getimageinfo ($source);
    $wInfo = Es_imagecls::getimageinfo ($water);
   If the picture is less than the watermark picture, do not generate the picture if ($sInfo ["0"] < $wInfo ["0"] | | | $sInfo [' 1 '] < $wInfo [' 1 ']) return false; if (Is_animated_gif ($source)) {require_once App_root_path. "
      System/utils/gif_encoder.php "; Require_once App_root_path. "
      System/utils/gif_reader.php ";
      $gif = new Gifreader ();
      $gif->load ($source);   
        foreach ($gif->imgs[' frames '] as $k => $img) {$im = imagecreatefromstring ($gif->getgif ($k));    
        add watermark to im $sImage = $im;
        $wCreateFun = "Imagecreatefrom". $wInfo [' type '];
        if (!function_exists ($wCreateFun)) $wCreateFun = ' imagecreatefromjpeg ';
        $wImage = $wCreateFun ($water);   
        Sets the blending mode imagealphablending ($wImage, true) of the image;
          Switch (intval ($position)) {case 0:break;
            Upper left Case 1: $posY = 0;
            $posX = 0;
            Generate mixed Image Imagecopymerge ($sImage, $wImage, $posX, $posY, 0, 0, $wInfo [0], $wInfo [1], $alpha);
          Break
            Upper right Case 2: $posY = 0; $posX = $sInfo [0]-$wINFO[0];
            Generate mixed Image Imagecopymerge ($sImage, $wImage, $posX, $posY, 0, 0, $wInfo [0], $wInfo [1], $alpha);
          Break
            Left case 3: $posY = $sInfo [1]-$wInfo [1];
            $posX = 0;
            Generate mixed Image Imagecopymerge ($sImage, $wImage, $posX, $posY, 0, 0, $wInfo [0], $wInfo [1], $alpha);
          Break
            Right Case 4: $posY = $sInfo [1]-$wInfo [1];
            $posX = $sInfo [0]-$wInfo [0];
            Generate mixed Image Imagecopymerge ($sImage, $wImage, $posX, $posY, 0, 0, $wInfo [0], $wInfo [1], $alpha);
          Break
            Center Case 5: $posY = $sInfo [1]/2-$wInfo [1]/2;
            $posX = $sInfo [0]/2-$wInfo [0]/2;
            Generate mixed Image Imagecopymerge ($sImage, $wImage, $posX, $posY, 0, 0, $wInfo [0], $wInfo [1], $alpha);
        Break
        //end im plus watermark ob_start ();
        Imagegif ($sImage);
        $content = Ob_get_contents (); Ob_end_cleAn ();
        $frames [] = $content;
      $framed [] = $img [' Framedelay '];
          $gif _maker = new Gifencoder ($frames, $framed, 0, 2, 0, 0, 0,
      "Bin"//bin is the address of binary URL);
      $image _rs = $gif _maker->getanimation ();
      If no save file name is given, the default is the original image name @unlink ($source);
      Save Image File_put_contents ($source, $image _rs);
    return true;
    //Create Image $sCreateFun = "Imagecreatefrom". $sInfo [' type '];
    if (!function_exists ($sCreateFun)) $sCreateFun = ' imagecreatefromjpeg ';
    $sImage = $sCreateFun ($source);
    $wCreateFun = "Imagecreatefrom". $wInfo [' type '];
    if (!function_exists ($wCreateFun)) $wCreateFun = ' imagecreatefromjpeg ';
    $wImage = $wCreateFun ($water);
    Sets the blending mode imagealphablending ($wImage, true) of the image;
      Switch (intval ($position)) {case 0:break;
        Upper left Case 1: $posY = 0;
        $posX = 0; Generate mixed Image Imagecopymerge ($sImage, $Wimage, $posX, $posY, 0, 0, $wInfo [0], $wInfo [1], $alpha);
      Break
        Upper right Case 2: $posY = 0;
        $posX = $sInfo [0]-$wInfo [0];
        Generate mixed Image Imagecopymerge ($sImage, $wImage, $posX, $posY, 0, 0, $wInfo [0], $wInfo [1], $alpha);
      Break
        Left case 3: $posY = $sInfo [1]-$wInfo [1];
        $posX = 0;
        Generate mixed Image Imagecopymerge ($sImage, $wImage, $posX, $posY, 0, 0, $wInfo [0], $wInfo [1], $alpha);
      Break
        Right Case 4: $posY = $sInfo [1]-$wInfo [1];
        $posX = $sInfo [0]-$wInfo [0];
        Generate mixed Image Imagecopymerge ($sImage, $wImage, $posX, $posY, 0, 0, $wInfo [0], $wInfo [1], $alpha);
      Break
        Center Case 5: $posY = $sInfo [1]/2-$wInfo [1]/2;
        $posX = $sInfo [0]/2-$wInfo [0]/2;
        Generate mixed Image Imagecopymerge ($sImage, $wImage, $posX, $posY, 0, 0, $wInfo [0], $wInfo [1], $alpha);
    Break
    //If no save file name is given, default is the original image name @unlink ($source); Save Image Imagejpeg ($sImage, $SOURCE,100);
  Imagedestroy ($sImage); } if (!function_exists (' image_type_to_extension ')) {function image_type_to_extension ($imagetype) {if Empty ($ima
    Getype)) return false;
      Switch ($imagetype) {case Imagetype_gif:return '. GIF ';
      Case Imagetype_jpeg:return '. JPEG ';
      Case Imagetype_png:return '. PNG ';
      Case Imagetype_swf:return '. SWF ';
      Case Imagetype_psd:return '. PSD ';
      Case Imagetype_bmp:return '. BMP ';
      Case Imagetype_tiff_ii:return '. TIFF ';
      Case Imagetype_tiff_mm:return '. TIFF ';
      Case Imagetype_jpc:return '. JPC ';
      Case Imagetype_jp2:return '. JP2 ';
      Case Imagetype_jpx:return '. JPF ';
      Case Imagetype_jb2:return '. Jb2 ';
      Case Imagetype_swc:return '. SWC ';
      Case Imagetype_iff:return '. Aiff ';
      Case Imagetype_wbmp:return '. WBMP ';
      Case Imagetype_xbm:return '. XBM ';
    Default:return false; }}}?>

2.get_spec_img () calls the picture class, and then saves the picture with a different specification in the following way and returns a picture connection

Get the corresponding specifications of the picture address//gen=0: To maintain proportional scaling, do not cut, such as height of 0, then ensure width scaling gen=1: To ensure long width, trim function get_spec_image ($img _path, $width =0, $height = 
  0, $gen =0, $is _preview=true) {if ($width ==0) $new _path = $img _path; 
    else {$img _name = substr ($img _path,0,-4);   
    $img _ext = substr ($img _path,-3); if ($is _preview) $new _path = $img _name. " _ ". $width." X ". $height.".   
    JPG "; else $new _path = $img _name. " O_ ". $width." X ". $height.".  
    JPG "; 
      if (!file_exists ($new _path)) {require_once "imagecls.php"; 
      $IMAGEC = new Imagecls (); 
      $thumb = $imagec->thumb ($img _path, $width, $height, $gen, True, "", $is _preview); 
        if (app_conf ("Public_domain_root")!= ') {$paths = PathInfo ($new _path); 
        $path = Str_replace ("./", "", $paths [' dirname ']); 
        $filename = $paths [' basename ']; 
            $pathwithoupublic = Str_replace ("public/", "", $path); 
            $file _data = @file_get_contents ($path. $file); $img = @imagecreatefromstring ($file _data); 
            if ($img!==false) {$save _path = "public/". $path;       
              if (!is_dir ($save _path)) {@mk_dir ($save _path); 
            @file_put_contents ($save _path. $name, $file _data); 
return $new _path; }

3. How to use:

Im: Store pictures are stored in 3 kinds of specifications: small figure: 48x48, 120x120, large figure 200x200
$small _url=get_spec_image ($data [' Image '],48,48,0);
$<span id= "Result_box" class= "Short_text" lang= "en" ><span>middle_url</span></span>=get_ Spec_image ($data [' Image '],120,120,0);
$big _url=get_spec_image ($data [' Image '],200,200,0);

I hope this article will help you with your PHP program design.