PHP創建具有固定寬度和高度的圖像縮略圖

Question

伙計們，我知道這個問題是以前問過的，但它不是一樣的，因為我嘗試了其他答案，但沒有按我希望的那樣工作。

我想使用php和縮略圖width =“ 265px”和height =“ 125px”創建縮略圖，這是我的代碼：

$image_width = $imageSize[0];
$image_height = $imageSize[1];

$new_size = ($image_width + $image_height) / ($image_width * ($image_height / 45));         //this will set any image to 125*70 which is a good thumbnail

$new_width = $image_width * $new_size;
$new_height = $image_height * $new_size;

if($ext == "gif"){ 
    $old_image = imagecreatefromgif($real_image_path);
}else if($ext =="png"){ 
    $old_image = imagecreatefrompng($real_image_path);
}else{ 
    $old_image = imagecreatefromjpeg($real_image_path);
}

$new_image = imagecreatetruecolor($new_width, $new_height);                                                     //creating new image with a new color for quality

imagecopyresized($new_image, $old_image, 0, 0, 0, 0, $new_width, $new_height, $image_width, $image_height);

我對我的評論不是很確定，但我只是寫了些以防萬一

我認為它需要一個數學上好的人

謝謝，新年快樂

Answer 1

不需要數學。

if($ext == "gif"){ 
    $old_image = imagecreatefromgif($real_image_path);
}else if($ext =="png"){ 
    $old_image = imagecreatefrompng($real_image_path);
}else{ 
    $old_image = imagecreatefromjpeg($real_image_path);
}
$data = getimagesize($real_image_path);

$height = 125;
$width = 265;
$thumb = imagecreatetruecolor($width, $height);
imagealphablending($thumb, false);
imagesavealpha($thumb, true);
imagecopyresampled($thumb, $old_image, 0, 0, 0, 0, $width, $height, $data[0], $data[1]);