The graph created by using the GD2 Library in php cannot be displayed in the browser.

Using the GD2 Library in php to create images cannot be displayed in the browser. I just learned PHP and cannot display images in the browser when using the GD2 library to create images, there is only one icon representing the image. my code is as follows: & lt ;? Php & nbsp; header (& quot; content-type: image/gif & quot;); & php uses the GD2 library to create images that cannot be displayed in the browser
Shortly after I first learned PHP, when I used the GD2 library to create an image, I couldn't display the image in the browser. there was only one icon representing the image. my code is as follows:
Header ("content-type: image/gif ");
$ Image = imagecreate (, 80 );
$ Bg = imagecolorallocate ($ image, 220, 40,120 );
Imagegif ($ image );
?>
It should be okay. In addition, my BOM header is removed, but it cannot be displayed. thank you for your guidance! Thank you!

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The code is okay. Check your environment. Enable the error prompt function.
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Well, it should be an environment setup problem! Download a wamp and enable the gd2 extension!
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You can use the same environment and code on other computers.

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After trying out the code, you can-(only display a sign indicating the image in the upper left corner) change the browser to see it...
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In fact, the GD library is not running normally. use another PHP version.
Discussion

It's useless to change the browser, or the image cannot be displayed, and
If (! Function_exists ("imagecreat "))
Echo "GD support is not installed ";
Else
If (! Function_exists ("imagecreattruecolor "))
Echo "GD2 is installed ";
?> After this code is executed, the output "GD support is not installed" is displayed, but my phpinfo () shows that there is ......