Generate thumbnail images in bulk with PHP

function Mkdirs ($dirname, $mode =0777)//Create directory (directory, [mode]) { if (!is_dir ($dirname)) { Mkdirs ($dirname, $mode); If the directory does not exist, recursive builds return mkdir ($dirname, $mode); } return true; } function SaveFile ($filename, $content = ")//Save file (file, [content]) { if (function_exists (file_put_contents)) { File_put_contents ($filename, $content); } Else { $FP =fopen ($filename, "WB"); Fwrite ($fp, $content); Fclose ($FP); } } function Getsuffix ($filename)//Get file name suffix { Return End (Explode (".", $filename)); } function Checksuffix ($filename, $arr)//is the allowable type (current, allowed) { if (!is_array ($arr)) { $arr =explode (",", Str_replace ("", "" ", $arr)); } Return In_array ($filename, $arr)? 1:0; } Class image { var $src; Source Address var $newsrc; New map path (after localization) var $allowtype =array (". gif", ". jpg", ". png", ". jpeg"); Allowed picture types var $regif = 0; Whether the thumbnail gif, for 0 does not handle var $keep = 0; Whether to keep the source file (1 is reserved, 0 is MD5) var $over = 0; Whether an existing picture can be overwritten, 0 is not overwritten var $dir; Image source Directory var $newdir; The directory after processing function __construct ($olddir =null, $newdir =null) { $this->dir= $olddir? $olddir: "./images/temp"; $this->newdir= $newdir? $newdir: "./images/s"; } function renames ($SRC) { $MD 5FILE=SUBSTR (MD5 ($SRC), 10,10). STRRCHR ($src, "."); MD5 file name (for example: 3293okoe.gif) $MD 5file= $this->w. " _ ". $this->h." _ ". $md 5file; File name after processing return $this->newdir. " /". $MD 5file; Save the source picture, MD5 file name to a new directory } function Mini ($SRC, $w, $h, $q =80)//Generate thumbnail Mini (image address, width, height, quality) { $this->src= $src; $this->w= $w; $this->h= $h; if (STRRCHR ($SRC, ".") = = ". gif" && $this->regif==0)//whether to process GIF graphs { return $this->src; } if ($this->keep==0)//whether to keep the source file, default does not retain { $NEWSRC = $this->renames ($SRC); The file address after renaming } else//Maintain original { $src =str_replace ("\ \", "/", $SRC); $NEWSRC = $this->NEWDIR.STRRCHR ($src, "/"); } if (file_exists ($NEWSRC) && $this->over==0)//If already present, return address directly { return $NEWSRC; } if (Strstr ($SRC, "/http") &&!strstr ($src, $_server[' http_host '))//If it is a network file, save it first { $SRC = $this->getimg ($SRC); } $arr =getimagesize ($SRC); Get Picture Properties $width = $arr [0]; $height = $arr [1]; $type = $arr [2]; Switch ($type) { Case 1://1 = GIF, $im =imagecreatefromgif ($SRC); Break Case 2://2 = JPG $im =imagecreatefromjpeg ($SRC); Break Case 3://3 = PNG $im =imagecreatefrompng ($SRC); Break Default return 0; } Working with thumbnail images $nim =imagecreatetruecolor ($w, $h); $k 1=round ($h/$w, 2); $k 2=round ($height/$width, 2); if ($k 1< $k 2) { $width _a= $width; $height _a=round ($width * $k 1); $SW = 0; $sh = ($height-$height _a)/2; } Else { $width _a= $height/$k 1; $height _a= $height; $SW = ($width-$width _a)/2; $sh = 0; } Create a picture if (function_exists (imagecopyresampled)) { Imagecopyresampled ($nim, $im, 0,0, $SW, $sh, $w, $h, $width _a, $height _a); } Else { Imagecopyresized ($nim, $im, 0,0, $SW, $sh, $w, $h, $width _a, $height _a); } if (!is_dir ($this->newdir)) { mkdir ($this->newdir); } Switch ($type)//Save Picture { Case 1: $rs =imagegif ($nim, $NEWSRC); Break Case 2: $rs =imagejpeg ($nim, $NEWSRC, $q); Break Case 3: $rs =imagepng ($nim, $NEWSRC); Break Default return 0; } return $NEWSRC; Return to post-processing path } function Getimg ($filename) { $MD 5file= $this->dir. " /". SUBSTR (MD5 ($filename), 10,10). STRRCHR ($filename,". "); if (file_exists ($MD 5file)) { return $MD 5file; } Start getting the file and return to the new path $img =file_get_contents ($filename); if ($img) { if (!is_dir ($this->dir)) { mkdir ($this->dir); } SaveFile ($md 5file, $img); return $MD 5file; } } function reimg ($SRC, $w, $h, $q)//Convert thumbnails (file name and structure unchanged) { $this->keep=1; return $this->mini ($SRC, $w, $h, $q); Address generated by return } } $image =new image (); echo $image->reimg ("Images/zht.jpg", 75,75,80); echo " "; echo $image->reimg ("Images/m8920.jpg", 75,75,80); echo " "; echo $image->getimg ("./images/s/zht.jpg"); ?> Copy Code

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