Let's talk about the reasons why pictures inserted in php are not displayed.

Inserting pictures in PHP is not a problem, but sometimes you may encounter the problem that the picture does not display. If you encounter this problem, it may be due to the following reasons:

1. Image path error
   When you insert an image in PHP, you need to specify the path of the image. If the path is incorrect, the image you inserted will not be displayed. If your image path is relative, you need to make sure the path is accessible relative to the current PHP script. If your image path is an absolute path, you need to ensure that the image path and your PHP file are on the same server. You can use PHP's file path manipulation functions to solve this problem.
2. The picture format is incorrect
   If the picture format you insert is incorrect, for example, if you insert a file in a non-picture format as a picture, the picture will not be displayed. Make sure the file you insert is a real image file, such as .jpg, .png, .gif, etc.
3. Image size exceeds limit
   Sometimes, the server may have a size limit to prevent users from uploading images that are too large. If the picture you insert exceeds the limit, the server will not be able to display the picture. You need to get the image size via PHP and check it before inserting the image.

Next, we will introduce some methods to solve the problem that the picture is not displayed:

1. Check the picture path
   First, you need to check whether the picture path is correct. If the path is incorrect, you need to reset the path information. If you are using a relative path, you need to make sure that the path is accessible relative to the current PHP script. If you are using an absolute path, you need to make sure the image path is on the same server as your PHP file.
2. Check the image format
   Secondly, you need to check whether the image format is correct. If the format is incorrect, you need to convert the image into the correct format before inserting it.
3. Check image size
   Finally, you need to use PHP's file size operation function to get the image size. If the image size exceeds the size limit set by the server, you need to reduce the image to a suitable size before inserting it.

In general, when you encounter the problem of images not displaying in PHP, you need to check whether the image path, format and size are correct, and take appropriate measures to solve the problem. These include resetting path information, converting images to the correct format, and reducing image size.

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