我正在使用以下格式上传图片：
include 'extraphp/config.php';
$title = $_POST['titleStory'];
$excerpt = $_POST['excerptStory'];
$story = $_POST['storyStory'];
$catagory = $_POST['catagory'];
$tags = $_POST['tagsStory'];
$author = $_POST['authorStory'];
$date = $_POST['dateStory'];
/* Image Upload */
$image = $_FILES["imageStory"];
$image2= preg_replace("/[^A-Z0-9._-]/i", "_", $image["name"]);
$target_dir = "../uploads/large/";
$target_file = $target_dir . $image2;
move_uploaded_file($_FILES['imageStory']['tmp_name'], $target_file);
$catagory2 = implode (", ", $catagory);
$author2 = implode(',', $author);
$sql="INSERT INTO story (titleStory,excerptStory,storyStory,catagory,tagsStory,authorStory,dateStory,imageStory) VALUES ('". $title ."','". $excerpt ."','". $story ."','". $catagory2 ."','". $tags ."','". $author2 ."','". $date ."','". $target_file ."')";
mysqli_query($con,$sql);
header("location: dashboard.php")
现在我想将此图像调整为180px X 109px 有人帮我吗？
答案 0 :(得分：2)
请记住，您需要检查图片扩展名才能使用corret imagecreate...功能。该示例使用始终imagecreatefromjpeg()，假设所有上传的图像都是JPG。
list( $imageWidth, $imageHeight ) = getimagesize( $target_file );
$resampledImage = imagecreatetruecolor( 180, 109 );
//Check file extension here to use the correct image create function
//imagecreatefromjpeg(); imagecreatefrompng(); imagecreatefromgif() etc...
$source = imagecreatefromjpeg( $target_file );
imagecopyresized( $resampledImage, $source, 180, 109, $imageWidth, $imageHeight );
ob_start();
//Check file extension here to use the correct image output function
//imagejpeg(); imagegif(); imagepng() etc...
imagejpeg( $resampledImage, null, 100 );
$imageContent = ob_get_clean();
file_put_contents( $target_file, $imageContent );
http://php.net/manual/en/function.getimagesize.php
http://php.net/manual/en/function.imagecreatetruecolor.php
http://php.net/manual/en/function.imagecreatefromjpeg.php
http://php.net/manual/en/function.imagecreatefrompng.php
http://php.net/manual/en/function.imagecopyresized.php
http://php.net/manual/en/function.imagejpeg.php