How to modify txt file in php

How to modify txt files in php: first use fopen to open the local txt file; then use fread to read the contents of the file; then modify and replace the text content; finally use fwrite to rewrite the modified file. Just replace and write it into a txt file.

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php to modify the txt file:

1. Use fopen to open the local txt file.

fopen() function opens a file or URL. If fopen() fails, it returns FALSE with an error message. You can hide error output by adding an '@' in front of the function name.

2. Use fread to read the contents of the file.

fread() function reads an open file. The function will stop running when it reaches the specified length or reaches the end of file (EOF), whichever comes first.

This function returns the read string, or FALSE if it fails.

3. Modify and replace the text content.

4. Use fwrite to replace the modified file and write it into the txt file.

fwrite() function writes the contents to an open file.

The function will stop running when it reaches the specified length or reaches the end of file (EOF) (whichever comes first).

If the function executes successfully, the number of bytes written is returned. On failure, returns FALSE.

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