What should I do if the picture added in php is not displayed?

Adding and displaying images in PHP is a very common task, but sometimes you encounter the problem that images cannot be displayed properly after adding them. This situation is usually caused by some common errors. Let's solve this problem step by step:

Step 1: Check the image path
Normally, when you add an image to PHP You need to use the correct file path when in a script. If you don't set the correct path, your image won't be found and won't be displayed correctly. Therefore, you need to check whether the image path in your code is correct.

Step 2: Check file permissions
If you set the correct path, but the image still cannot be displayed, then you need to check the file permissions of your server. Make sure the PHP file you use has permission to read this image. You can check file permissions by looking at file properties and using tools like FTP.

Step 3: Check the image format
If the image path and permissions set in your PHP code are correct, but the image still cannot be displayed normally, then you need to check your image format. Normally, PHP supports common image formats such as JPEG, PNG and GIF. If you use an unsupported image format, your image will not be displayed correctly.

Step 4: Check GD library support
If your PHP program uses the GD library, then you need to check whether the library is correctly installed and enabled. The GD library is an image processing library. If it is not installed or enabled correctly, your images will not be displayed properly.

Step 5: Use the complete path
In some cases, it is not feasible to use relative paths to add images. Therefore, you need to use the full path to add the image. This will ensure that your program can correctly find the image and display it.

Summary:
Check whether the image path is set correctly; check file permissions; check image format; check whether the GD library is installed and enabled; use the complete path. If you follow the steps above to check and correct problems in your PHP program, your images will be displayed correctly.

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