php实现图片上传并利用ImageMagick生成缩略图

使用ImageMagick，您可以轻松，更快地创建缩略图，比使用PHP的容易得多。

    <?php
    // Location to upload main image:
    $mainDir = $_SERVER['DOCUMENT_ROOT'].'/images/l/';
    // Location to create the thumb image:
    $smalDir = $_SERVER['DOCUMENT_ROOT'].'/images/s/';
    // Command to use:
    $command = '/usr/bin/convert';
    // Thumbnail width:
    $size = 210;
    // Make sure we have an image:
    if(isset($_POST['submit'])){
    if(getimagesize($_FILES['photo']['tmp_name'])){
    $name = $_FILES['photo']['name'];
    $uploadfile = $mainDir . $name;
    move_uploaded_file($_FILES['photo']['tmp_name'], $uploadfile);
    $lrgImg = $mainDir . $name;
    $smlImg = $smalDir . $name;
    $imageMagick = $command . " '". $lrgImg . "' -resize '$size' '" . $smlImg . "'";
    shell_exec($imageMagick);
    }
    header("Location: /test.php");
    exit;
    }else{
    ?>
    <form action=" <?php echo $_SERVER['PHP_SELF']; ?> " method="post" enctype="multipart/form-data">
    <p><input type="file" name="photo" /></p>
    <p><input type="submit" value="Upload!" name="submit" /></p>
    </form>
    <?php
    foreach(glob($smalDir.'*') as $img){
    echo ' <img src="'.str_replace($_SERVER['DOCUMENT_ROOT'], '',$img).'" /> ';
    }
    }
    ?>

希望本文所述对大家学习php程序设计有所帮助。