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   ?? ???? ???? ?? ??? ??? ??? ???? ? ?? ?? ??? ?? ? ?? ???? ?? ?? ?? ?????. ??? PHP? ???? ??? ???? ?? ?? ?????.

// 設(shè)置剪裁后的尺寸
$width = 200;
$height = 200;

// 創(chuàng)建一個(gè)指定尺寸的畫布
$canvas = imagecreatetruecolor($width, $height);

// 從原始圖片中剪裁所需區(qū)域
$source_image = imagecreatefromjpeg('source.jpg');
imagecopyresampled($canvas, $source_image, 0, 0, 0, 0, $width, $height, imagesx($source_image), imagesy($source_image));

// 將剪裁后的圖片保存到文件
imagejpeg($canvas, 'cropped.jpg');

// 釋放內(nèi)存
imagedestroy($canvas);
imagedestroy($source_image);

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   ??? ?? ??? ??? ??? ???? ? ????? ???? ?? ??? ?? ??? ????? ????? ?? ??? ? ????. ??? PHP? ??? ??? ?? ??? ?? ?????.

// 設(shè)置縮放后的尺寸
$width = 500;
$height = 500;

// 創(chuàng)建一個(gè)指定尺寸的畫布
$canvas = imagecreatetruecolor($width, $height);

// 縮放原始圖片到目標(biāo)尺寸
$source_image = imagecreatefromjpeg('source.jpg');
imagecopyresampled($canvas, $source_image, 0, 0, 0, 0, $width, $height, imagesx($source_image), imagesy($source_image));

// 將縮放后的圖片保存到文件
imagejpeg($canvas, 'resized.jpg');

// 釋放內(nèi)存
imagedestroy($canvas);
imagedestroy($source_image);

3. ?? ??
   ?? ??? ??? ??? ??? ???? ???? ??? ?? ??? ?? ? ????. ??? PHP? ??? ??? ?? ??? ?? ?? ?????.

// 創(chuàng)建一個(gè)原始圖片副本
$source_image = imagecreatefromjpeg('source.jpg');
$filtered_image = imagecreatetruecolor(imagesx($source_image), imagesy($source_image));

// 應(yīng)用濾鏡效果
imagefilter($source_image, IMG_FILTER_GRAYSCALE);
imagecopy($filtered_image, $source_image, 0, 0, 0, 0, imagesx($source_image), imagesy($source_image));

// 將濾鏡處理后的圖片保存到文件
imagejpeg($filtered_image, 'filtered.jpg');

// 釋放內(nèi)存
imagedestroy($source_image);
imagedestroy($filtered_image);

4. ?? ????
   ?? ????? ??? ???? ???? ???? ??? ??? ??? ??? ???? ????. ??? ??? ???? ??? ?? PHP? ???? ?? ?????.

// 創(chuàng)建一個(gè)原始圖片副本
$source_image = imagecreatefromjpeg('source.jpg');

// 設(shè)置水印文字和字體大小
$text = 'Watermark';
$font_size = 20;

// 設(shè)置水印文字顏色
$red = 255;
$green = 255;
$blue = 255;
$text_color = imagecolorallocate($source_image, $red, $green, $blue);

// 在圖片上添加水印文字
imagettftext($source_image, $font_size, 0, 10, 50, $text_color, 'arial.ttf', $text);

// 將帶有水印的圖片保存到文件
imagejpeg($source_image, 'watermarked.jpg');

// 釋放內(nèi)存
imagedestroy($source_image);

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PHP? ???? ??? ?? ??? ?? ?? ? ???? ???? ?? ?? ? ?????. ??? ???, ?? ??, ?? ??, ???? ?? ?? ??? ?? ???? ?? ???? ????? ??? ???? ??? ??? ???? ?? ? ????. ?? ?? ??? ???? ??? ?? ?? ?? ???? ?? ??? ?? ?? ? ??? ? ????. ? ??? PHP? ???? ?? ?? ??? ?? ? ??? ??? ????.

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