How to replace file content in php

How to replace file content in php: first use fopen to open the local txt file; then use fread to read the content of the file; then modify and replace the text content; finally use fwrite to re-write the modified file. Just enter the txt file.

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php replacement file content:

Generally divided into four steps, as follows:

1. Use fopen to open the local txt file.

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

3. Modify and replace the text content.

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

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