imagejpeg
(PHP 4, PHP 5, PHP 7)
imagejpeg — 锟斤拷锟酵硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥硷拷锟斤拷
说锟斤拷
$image
[, string $filename
[, int $quality
]] ) : bool
imagejpeg() 锟斤拷 image
图锟斤拷锟斤拷 filename 为锟侥硷拷锟斤拷锟斤拷锟斤拷一锟斤拷
JPEG 图锟斤拷
锟斤拷锟斤拷
-
image -
锟斤拷图锟襟创斤拷锟斤拷锟斤拷(锟斤拷锟斤拷imagecreatetruecolor())锟斤拷锟截碉拷图锟斤拷锟斤拷源锟斤拷
-
filename -
锟侥硷拷锟斤拷锟斤拷锟铰凤拷锟斤拷锟斤拷锟斤拷未锟斤拷锟矫伙拷为
NULL锟斤拷锟斤拷锟斤拷直锟斤拷锟斤拷锟皆纪硷拷锟斤拷锟斤拷锟�锟斤拷锟揭★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟结供
quality锟斤拷锟斤拷锟斤拷使锟斤拷NULL锟斤拷 -
quality -
quality为锟斤拷选锟筋，锟斤拷围锟斤拷 0锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷募锟斤拷锟叫★拷锟斤拷锟� 100锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷募锟斤拷锟襟）★拷默锟斤拷为 IJG 默锟较碉拷锟斤拷锟斤拷值锟斤拷锟斤拷约 75锟斤拷锟斤拷
锟斤拷锟斤拷值
锟缴癸拷时锟斤拷锟斤拷 TRUE锟斤拷 锟斤拷锟斤拷锟斤拷失锟斤拷时锟斤拷锟斤拷 FALSE锟斤拷
锟斤拷锟斤拷
Example #1 锟斤拷锟� JPEG 图锟斤拷
<?php
// 锟斤拷锟斤拷锟秸帮拷图锟斤拷锟斤拷锟揭恍╋拷谋锟�
$im = imagecreatetruecolor(120, 20);
$text_color = imagecolorallocate($im, 233, 14, 91);
imagestring($im, 1, 5, 5, 'A Simple Text String', $text_color);
// 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟酵憋拷头 —— 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟� image/jpeg
header('Content-Type: image/jpeg');
// 锟斤拷锟酵硷拷锟�
imagejpeg($im);
// 锟酵凤拷锟节达拷
imagedestroy($im);
?>
锟斤拷锟斤拷锟斤拷锟教碉拷锟斤拷锟斤拷锟斤拷锟斤拷冢锟�
Example #2 锟斤拷锟斤拷一锟斤拷 JPEG 图锟斤拷
<?php
// 锟斤拷锟斤拷锟秸帮拷图锟斤拷锟斤拷锟揭恍╋拷谋锟�
$im = imagecreatetruecolor(120, 20);
$text_color = imagecolorallocate($im, 233, 14, 91);
imagestring($im, 1, 5, 5, 'A Simple Text String', $text_color);
// 锟斤拷锟斤拷图锟斤拷为 'simpletext.jpg'
imagejpeg($im, 'simpletext.jpg');
// 锟酵凤拷锟节达拷
imagedestroy($im);
?>
Example #3 锟斤拷 75% 锟斤拷图锟斤拷锟斤拷锟斤拷锟斤拷锟酵硷拷锟�
<?php
// 锟斤拷锟斤拷锟秸帮拷图锟斤拷锟斤拷锟揭恍╋拷谋锟�
$im = imagecreatetruecolor(120, 20);
$text_color = imagecolorallocate($im, 233, 14, 91);
imagestring($im, 1, 5, 5, 'A Simple Text String', $text_color);
// 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟酵憋拷头 —— 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟� image/jpeg
header('Content-Type: image/jpeg');
// 使锟斤拷 NULL 锟斤拷锟斤拷 filename 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷图锟斤拷锟斤拷锟斤拷为 75%
imagejpeg($im, NULL, 75);
// 锟酵凤拷锟节达拷
imagedestroy($im);
?>
注锟斤拷
Note: JPEG 支锟街斤拷锟斤拷 PHP 锟斤拷 GD-1.8 锟斤拷锟斤拷甙姹疽伙拷锟斤拷锟斤拷时锟斤拷锟矫★拷
Note:
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷式 JPEG锟斤拷锟斤拷要锟斤拷 imageinterlace() 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷扫锟斤拷锟斤拷锟斤拷锟轿伙拷锟�
锟轿硷拷
- imagepng() - 锟斤拷 PNG 锟斤拷式锟斤拷图锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥硷拷
- imagegif() - 锟斤拷锟酵硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥硷拷锟斤拷
- imagewbmp() - 锟斤拷 WBMP 锟斤拷式锟斤拷图锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥硷拷
- imageinterlace() - 锟斤拷锟斤拷锟斤拷止锟斤拷锟斤拷扫锟斤拷
- imagetypes() - 锟斤拷锟截碉拷前 PHP 锟芥本锟斤拷支锟街碉拷图锟斤拷锟斤拷锟斤拷