How can PHP be used to dynamically remove specific characters from a text file?

To dynamically remove specific characters from a text file using PHP, we can read the contents of the file, use the `str_replace()` function to replace the specific characters with an empty string, and then write the modified content back to the file. 

<?php
// Specify the file path
$file_path = 'example.txt';

// Read the contents of the file
$file_content = file_get_contents($file_path);

// Specify the characters to remove
$characters_to_remove = ['a', 'b', 'c'];

// Remove the specified characters
$modified_content = str_replace($characters_to_remove, '', $file_content);

// Write the modified content back to the file
file_put_contents($file_path, $modified_content);

echo "Specific characters have been removed from the file.";
?>

Keywords

PHP file handling string manipulation regular expressions character removal

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