PHP native thumbnails

For those of us who have been using frameworks, native code is already very unfamiliar. Let’s go straight to the code without further ado.

Front code

<?php
//var_dump(gd_info());die();
 header("Content-Type:text/html;charset=gbk");

$filepatch=$_GET['img_path'];

$type=$_GET['type'];

 function my_scandir($dir){
        $files=array();
        if(is_dir($dir)){
            if($handle=opendir($dir)){
                while(($file=readdir($handle))!==false){
                    if($file!='.' && $file!=".."){
                        if(is_dir($dir."/".$file)){
                            $files[$file]=my_scandir($dir."/".$file);
                        }else{
                            $extend = explode("." , $file);
                            $attr = strtolower($extend[count($extend) - 1]);
                            if(in_array($attr,array('jpg','png','jpeg','gif'))){
                                $files[]=$dir."/".$file;  
                            }
                        }
                    }
                }
            }
             closedir($handle);
        }

        return $files;
    }
?>
<body>
<?php
if($type=='1'){
?>
    <form action="action.php?img_path=<?php echo $filepatch;?>" method="post" enctype="multipart/form-data" name="upload_form">
        <label>请选择图片/label>
        <input name="file" type="file" accept="image/*"/>
        <input id="upload" name="upload" type="submit" value="上传" />
    </form>
<?php
}else{ ?>
	 <form action="action.php?img_path=<?php echo $filepatch;?>" method="post" enctype="multipart/form-data" name="upload_form">
        <label>请选择图片</label>
        <input name="file" type="file" accept="image/*"/>
        <input id="upload" name="upload" type="submit" value="上传" />
    </form>
    <?php


    $picArr = my_scandir("./ItemCode/".$filepatch);
    foreach ($picArr as $k=>$v){
        ?>
      
        <img src="<?php echo $v;?>" title="" width="200px" height="300px">
      <br/>
        <?php
    }
}
?>


</body>

backend code

<?php
$img_path=trim($_GET['img_path']);
$allowedExts = array("gif", "jpeg", "jpg", "png");
$temp = explode(".", $_FILES["file"]["name"]);
$extension = end($temp);     // 获取文件后缀名

if (in_array($extension, $allowedExts)){
    $timename=date('YmdHis',time()).rand(0,9999).".".$extension;
    if (!file_exists("./Product/".$img_path)) {
        mkdir ("./Product/".$img_path, 0777, true );
    }
    elseif(!file_exists('ItemCode')){
        mkdir ("./ItemCode/".$img_path, 0777, true );
    }
    elseif(!file_exists('FNname')){
        mkdir ("./FNname/".$img_path, 0777, true );
    }
    elseif(!file_exists('seq')){
        mkdir ("./seq/".$img_path, 0777, true );

    }
    $name="./Image/".$img_path.'/'.$timename;

    if(move_uploaded_file($_FILES["file"]["tmp_name"], $name)){
//        $arr=array('status'=>'1','msg'=>'上传成功','pic'=>$timename);
//        echo "javascript:alert(''执行成功!'');";
        echo "<script> alert('上传成功'); </script>";

    }else{
//        $arr=array('status'=>'0','msg'=>'上传失败');
        echo '上传失败';
    }
}else
{
    $arr=array('status'=>'0','msg'=>'文件格式不合法');
    echo json_encode($arr);
}


$name="./Image".$img_path.'/'.$timename;
//缩略图保存地址
$smallfile = "./ItemCode".$img_path.'/'.$timename;


if($_FILES['file']['type'] == $allowedExts)
{
    echo '文件类型错误';
}
else {
    move_uploaded_file($_FILES['file']['tmp_name'], $smallfile); //上传文件

    $dstW = 200;//缩略图宽
    $dstH = 200;//缩略图高

    $src_image = imagecreatefrompng($name);
    $srcW = ImageSX($src_image); //获得图片宽
    $srcH = ImageSY($src_image); //获得图片高

    $dst_image = ImageCreateTrueColor($dstW, $dstH);
    ImageCopyResized($dst_image, $src_image, 0, 0, 0, 0, $dstW, $dstH, $srcW, $srcH);
    ImageJpeg($dst_image, $smallfile);

    echo '文件上传成功<br>';
    echo "<img src='$smallfile' />";
}

PHP native thumbnails

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