PHP AdvancedLesson 32Free preview

PHP File Handling

This lesson is part of PHP · All levels

Summary

PHP can work with files on servers, from checking for existence, reading, writing, to deleting them. This lesson introduces the basic file handling functions and opening modes such as r, w, and a. File path security is essential to preventing attacks on applications.

Key points

Check if a file exists
Mode r to read, w to write/write, a to add at the end
Always close the file that is opened with fclose()
Validate the file path so that users cannot access any location

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