PHP Files & I/O

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PHP is a popular server-side programming language used for web development. It provides many functions and features for file input/output (I/O), which allows PHP to interact with files on the server or on the client side. Here are some of the basic functions for handling files in PHP:

  1. fopen(): This function opens a file and returns a file pointer. It takes two parameters – the file name and the mode in which to open the file.
  2. fclose(): This function closes an open file. It takes one parameter – the file pointer returned by the fopen() function.
  3. fread(): This function reads data from a file. It takes two parameters – the file pointer and the number of bytes to read.
  4. fwrite(): This function writes data to a file. It takes three parameters – the file pointer, the data to write, and the length of the data.
  5. fgets(): This function reads a line from a file. It takes one parameter – the file pointer.
  6. file(): This function reads an entire file into an array. It takes one parameter – the file name.
  7. file_get_contents(): This function reads an entire file into a string. It takes one parameter – the file name.
  8. file_put_contents(): This function writes a string to a file. It takes two parameters – the file name and the string to write.
  9. unlink(): This function deletes a file. It takes one parameter – the file name.
  10. rename(): This function renames a file. It takes two parameters – the current file name and the new file name.

These are just some of the basic functions for file I/O in PHP. There are many other functions and features available for more advanced file handling, such as file locking, directory manipulation, and more.

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