How to generate thumbnails in php

本篇文章主要介绍php生成缩略图的方法，感兴趣的朋友参考下，希望对大家有所帮助。

PHP上传图片、生成缩略图是比较常用到的功能，一般我们会把这些功能写一个类，方便我们调用。今天发现了一个比较简单些的PHP生成缩略图函数的代码，不敢独享，特此与大家分享。自己使用时候认真看一下，代码中都有注释的。

本文实例讲述了PHP简单生成缩略图相册的方法。具体如下：

<?php
/*
 * written by mot
 * 根目录下自己新建image thumb目录
 * */
class thumb{
  private $src;
  private $source;
  private $s_width;
  private $s_height;
  private $dest;
  private $d_height;
  private $d_width;
  private $name;
  public function thumb($image_path,$rate = 0.5){
    $this->src = $image_path;
    $this->source = imagecreatefromjpeg($image_path);
    $s_size = getimagesize($image_path);
    $this->s_height = $s_size[1];
    $this->s_width = $s_size[0];
    $this->d_height = 100;
    $this->d_width = 100;
    $this->dest = imagecreate($this->d_width, $this->d_height);
    $this->name = explode(&#39;.jpg&#39;, $image_path);
    $this->name = $this->name[0];
  }
  public function make(){
    imagecopyresized($this->dest, $this->source, 0, 0, 0, 0, $this->d_width, $this->d_height,
    $this->s_width, $this->s_height);
    $thumb = str_replace(&#39;image&#39;, &#39;thumb&#39;, $this->name.&#39;-thumb.jpg&#39;);
    imagejpeg($this->dest,$thumb,100);
    $img = $thumb;
    echo "<a href=$this->src><img src=$img></a>";
  }
}
$hl = opendir(".\\image\\");
while(false != $file = readdir($hl)){
  if($file == &#39;.&#39; || $file == &#39;..&#39;) continue;
  $path = &#39;.\\image\\&#39;.$file;
  $tmp = new thumb($path,0.3);
  $tmp->make();
}

总结：以上就是本篇文的全部内容，希望能对大家的学习有所帮助。

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