How to read file, write file, and append file in php?

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How to read file, write file, and append file in php?

The following is the code to read file, write file, and append file in php:

1. How to write file in php?

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< ?php

    $file = "test.txt";
    $f_handle = fopen($myFile, 'w') or die("can't open file");
    $inputData = "this is a test\n";
    fwrite(f_handle, $inputData);
    fclose(f_handle);

? >

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Note: 
'w' is for writing or replacing the entire contents of the file. For append, use 'a'.

2. How to read file in php?


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< ?php
 
    $file = "test.txt";
    $f_handle = fopen($file, "r");
    while (!feof($f_handle)) {
       $line = fgets($f_handle);
       echo $line;
    }
    fclose($f_handle);
? >

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An example of reading entire file:

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< ?php
    
    $file = "test.txt";
    $entire_file = file_get_contents($file);
    echo $entire_file;

? >