A simple way to create a compression diagram in PHP _php tips

This article illustrates a simple way to create a compression diagram in PHP. Share to everyone for your reference, specific as follows:

<?php//Create compression graph function _create_thumbnail ($srcFile, $toW, $toH, $toFile = "") {if ($toFile = = "") {$toFile = $s
  Rcfile;
  } $info = "";
  $data = getimagesize ($srcFile, $info);
  if (! $data) return false;
      Load the file into the resource variable im switch ($data [2]) {Case 1: $im = Imagecreatefromgif ($srcFile);
    Break
      Case 2: $im = Imagecreatefromjpeg ($srcFile);
    Break
      Case 3: $im = Imagecreatefrompng ($srcFile);
  Break
  ///compute the width and height of the thumbnail $srcW = Imagesx ($im);
  $srcH = Imagesy ($im);
  $toWH = $toW/$toH;
  $srcWH = $srcW/$srcH;
    if ($toWH <= $srcWH) {$ftoW = $toW;
  $ftoH = (int) ($ftoW * ($srcH/$srcW));
    else {$ftoH = $toH;
  $ftoW = (int) ($ftoH * ($srcW/$srcH)); } if (Function_exists ("Imagecreatetruecolor")) {$ni = Imagecreatetruecolor ($ftoW, $ftoH);//Create a new True color image if ($ni
    {//resampling copies of partial images and resizing to maintain better sharpness imagecopyresampled ($ni, $im, 0, 0, 0, 0, $ftoW, $ftoH, $srcW, $srcH); } ELSE {//Copy part of image and resize $ni = Imagecreate ($ftoW, $ftoH);
    Imagecopyresized ($ni, $im, 0, 0, 0, 0, $ftoW, $ftoH, $srcW, $srcH);
    } else {$ni = Imagecreate ($ftoW, $ftoH);
  Imagecopyresized ($ni, $im, 0, 0, 0, 0, $ftoW, $ftoH, $srcW, $srcH); //Save to file Unified for. png format imagepng ($ni, $toFile);
  Output the image to the browser or file Imagedestroy ($ni) in PNG format;
Imagedestroy ($im);

 }?>

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