PHP Smart image generation thumbnail class _php tutorial

A PHP smart image generation thumbnail class, can be automatically based on the size of your image to generate such proportions of the picture Oh, the need for friends can refer to.

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< PHP /*************************************** * Author: Falling Dream Scorpio (beluckly) * Completion time: 2006-12-18 * Class Name: Creatminiature * Function: Generate multiple types of thumbnails * Basic parameters: $srcFile, $echoType * The parameters used in the method: $toFile, the resulting file $toW, the resulting width $toH, the resulting high $BK 1, the background color parameter is the highest of 255 $BK 2, background color parameters $BK 3, background color parameters Example Include ("thumb.php"); $CM =new creatminiature (); $CM->setvar ("1.jpg", "file"); $CM->distortion ("Dis_bei.jpg", 150,200); $CM->prorate ("Pro_bei.jpg", 150,200); $CM->cut ("Cut_bei.jpg", 150,200); $CM->backfill ("Fill_bei.jpg", 150,200); ***************************************/ Class Creatminiature { Public variables var $srcFile = ""; Original var $echoType; Output picture type, link--not saved as file; file--saved as File var $im = ""; Temp variable var $srcW = ""; Original width var $srcH = ""; Original height Setting variables and initialization function SetVar ($srcFile, $echoType) { $this->srcfile= $srcFile; $this->echotype= $echoType; $info = ""; $data = getimagesize ($this->srcfile, $info); Switch ($data [2]) { Case 1: if (!function_exists ("Imagecreatefromgif")) { echo "Your GD library cannot use GIF format pictures, please use JPEG or PNG format!" Return "; Exit (); } $this->im = imagecreatefromgif ($this->srcfile); Break Case 2: if (!function_exists ("Imagecreatefromjpeg")) { echo "Your GD library can not use JPEG format pictures, please use other format pictures!" Return "; Exit (); } $this->im = imagecreatefromjpeg ($this->srcfile); Break Case 3: $this->im = imagecreatefrompng ($this->srcfile); Break } $this->srcw=imagesx ($this->im); $this->srch=imagesy ($this->im); } To create a distorted shape thumbnail function Distortion ($toFile, $toW, $toH) { $CIMG = $this->creatimage ($this->im, $toW, $toH, 0,0,0,0, $this-&GT;SRCW, $this->srch); return $this->echoimage ($CIMG, $toFile); Imagedestroy ($CIMG); } To generate a proportionally scaled thumbnail function prorate ($toFile, $toW, $toH) { $toWH = $toW/$toH; $srcWH = $this->srcw/$this->srch; if ($toWH < = $srcWH) { $ftoW = $toW; $ftoH = $ftoW * ($this->srch/$this-&GT;SRCW); } else { $ftoH = $toH; $ftoW = $ftoH * ($this->srcw/$this->srch); } if ($this->srcw> $toW | | $this->srch> $toH) { $CIMG = $this->creatimage ($this->im, $ftoW, $ftoH, 0,0,0,0, $this-&GT;SRCW, $this->srch); return $this->echoimage ($CIMG, $toFile); Imagedestroy ($CIMG); } Else { $CIMG = $this->creatimage ($this->im, $this-&GT;SRCW, $this->srch,0,0,0,0, $this-&GT;SRCW, $this->srch); return $this->echoimage ($CIMG, $toFile); Imagedestroy ($CIMG); } } Generate the smallest cropped thumbnail function Cut ($toFile, $toW, $toH) { $toWH = $toW/$toH; $srcWH = $this->srcw/$this->srch; if ($toWH < = $srcWH) { $ctoH = $toH; $ctoW = $ctoH * ($this->srcw/$this->srch); } Else { $ctoW = $toW; $ctoH = $ctoW * ($this->srch/$this-&GT;SRCW); } $ALLIMG = $this->creatimage ($this->im, $ctoW, $ctoH, 0,0,0,0, $this-&GT;SRCW, $this->srch); $CIMG = $this->creatimage ($allImg, $toW, $toH, 0,0, ($ctoW-$toW)/2, ($ctoH-$toH)/2, $toW, $toH); return $this->echoimage ($CIMG, $toFile); Imagedestroy ($CIMG); Imagedestroy ($ALLIMG); } Create a thumbnail of the background fill function Backfill ($toFile, $toW, $toH, $BK 1=255, $BK 2=255, $BK 3=255) { $toWH = $toW/$toH; $srcWH = $this->srcw/$this->srch; if ($toWH < = $srcWH) { $ftoW = $toW; $ftoH = $ftoW * ($this->srch/$this-&GT;SRCW); } Else { $ftoH = $toH; $ftoW = $ftoH * ($this->srcw/$this->srch); } if (function_exists ("Imagecreatetruecolor")) { @ $cImg =imagecreatetruecolor ($toW, $toH); if (! $cImg) { $CIMG =imagecreate ($toW, $toH); } } Else { $CIMG =imagecreate ($toW, $toH); } $backcolor = Imagecolorallocate ($cImg, $BK 1, $BK 2, $BK 3); The background color of the fill Imagefilledrectangle ($CIMG, 0,0, $toW, $toH, $backcolor); if ($this->srcw> $toW | | $this->srch> $toH) { $PROIMG = $this->creatimage ($this->im, $ftoW, $ftoH, 0,0,0,0, $this-&GT;SRCW, $this->srch); /* if ($ftoW < $toW) { Imagecopymerge ($CIMG, $PROIMG, ($toW-$ftoW)/2,0,0,0, $ftoW, $ftoH, 100); } else if ($ftoH < $toH) { Imagecopymerge ($CIMG, $PROIMG, 0, ($toH-$ftoH)/2,0,0, $ftoW, $ftoH, 100); } */ if ($ftoW < $toW) { Imagecopy ($CIMG, $PROIMG, ($toW-$ftoW)/2,0,0,0, $ftoW, $ftoH); } else if ($ftoH < $toH) { Imagecopy ($CIMG, $PROIMG, 0, ($toH-$ftoH)/2,0,0, $ftoW, $ftoH); } Else { Imagecopy ($CIMG, $PROIMG, 0,0,0,0, $ftoW, $ftoH); } } Else { Imagecopymerge ($CIMG, $this->im, ($toW-$ftoW)/2, ($toH-$ftoH)/2,0,0, $ftoW, $ftoH, 100); } return $this->echoimage ($CIMG, $toFile); Imagedestroy ($CIMG); } function Creatimage ($img, $creatW, $creatH, $dstX, $dstY, $srcX, $srcY, $srcImgW, $srcImgH) { if (function_exists ("Imagecreatetruecolor")) { @ $creatImg = Imagecreatetruecolor ($creatW, $creatH); if ($CREATIMG) Imagecopyresampled ($CREATIMG, $img, $dstX, $dstY, $srcX, $srcY, $creatW, $creatH, $srcImgW, $srcImgH); Else { $CREATIMG =imagecreate ($creatW, $creatH); Imagecopyresized ($CREATIMG, $img, $dstX, $dstY, $srcX, $srcY, $creatW, $creatH, $srcImgW, $srcImgH); } } Else { $CREATIMG =imagecreate ($creatW, $creatH); Imagecopyresized ($CREATIMG, $img, $dstX, $dstY, $srcX, $srcY, $creatW, $creatH, $srcImgW, $srcImgH); } return $CREATIMG; } Output picture, link---only output, do not save the file. file--Save As File function Echoimage ($img, $to _file) { Switch ($this->echotype) { Case "link": if (function_exists (' imagejpeg ')) return imagejpeg ($IMG); else return imagepng ($img); Break Case "File": if (function_exists (' imagejpeg ')) return imagejpeg ($img, $to _file); else return imagepng ($img, $to _file); Break } } } ?>

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