[PHP] 縮圖
Sample code
<?php
/**
* @file name Resizing Images in PHP
* @create date 20160229
*/
if(isset($_POST["submit"])) {
$v_upload_ok = 1;
$v_target_dir = "file/"; // 欲上傳存放的目錄位置
$v_upload_file = $_FILES['uploaded_file']; // 上傳檔案
$v_file_name = $v_upload_file["name"]; // 檔案原始名稱
$v_file_type = $v_upload_file["type"]; // 檔案類型
$v_file_size = $v_upload_file["size"]; // 檔案原始大小
$v_explode = explode(".", $v_file_name);
$v_file_ext = end( $v_explode ); // 檔案副檔名
$v_file_tmp = $v_upload_file["tmp_name"]; // 檔案暫存資料夾位置
$v_file_error = $v_upload_file["error"]; // 檔案上傳錯誤代碼顯示
// echo "<pre>";
// print_r($v_upload_file);
// echo "</pre>";
$v_target_file = $v_target_dir . "target.".$v_file_ext;
$v_resized_file = $v_target_dir . "resize.".$v_file_ext;
$check = getimagesize($v_file_tmp);
if( $check !== false ) {
echo "<h2>File is an image - " . $check["mime"] . "." . "</h2>";
move_uploaded_file($v_file_tmp, $v_target_file);
image_resize($v_target_file, $v_resized_file, 150, 150, $v_file_ext);
$v_upload_ok = 1;
} else {
echo "<h2>File is not an image.</h2>";
$v_upload_ok = 0;
}
echo "<h2>";
echo ($v_upload_ok == 0) ? ("Upload failed !") : ("Upload Successful !");
echo "</h2>";
} //end
function image_resize($target, $newcopy, $w, $h, $ext) {
list($w_orig, $h_orig) = getimagesize($target);
$scale_ratio = $w_orig / $h_orig;
if (($w / $h) > $scale_ratio) {
$w = $h * $scale_ratio;
} else {
$h = $w / $scale_ratio;
}
$img = "";
$ext = strtolower($ext);
if ($ext == "gif"){
$img = imagecreatefromgif($target);
} else if($ext =="png"){
$img = imagecreatefrompng($target);
} else {
$img = imagecreatefromjpeg($target);
}
$tci = imagecreatetruecolor($w, $h);
imagecopyresampled($tci, $img, 0, 0, 0, 0, $w, $h, $w_orig, $h_orig);
imagejpeg($tci, $newcopy, 80);
}
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>example</title>
</head>
<body>
<form action="example.php" method="post" enctype="multipart/form-data">
Select image to upload:
<input type="file" name="uploaded_file">
<input type="submit" value="Upload Image" name="submit">
</form>
</body>
</html>
Source
☞ Image Resize Function Tutorial jpg gif png Change Size (**範例來源)☞ php實現的非常好用的圖片大小調整(image resize)函數
☞ Função imagecopyresampled() do PHP cortando no lugar errado
☞ PHP 5 File Upload
沒有留言: