What are the differences between using GREP and PERL compared to PHP for searching and displaying content in a file?

When searching and displaying content in a file, GREP and PERL are command-line tools that are more specialized for text processing tasks, while PHP is a general-purpose scripting language. GREP is used for searching text patterns in files, PERL is a more powerful tool for text manipulation and regular expressions, and PHP can be used for a wide range of web development tasks, including file manipulation. 

<?php
$file = 'example.txt';
$searchTerm = 'keyword';

// Using PHP to search and display content in a file
$contents = file_get_contents($file);
if (strpos($contents, $searchTerm) !== false) {
    echo "Keyword found in file: $file";
} else {
    echo "Keyword not found in file: $file";
}
?>

Keywords

GREP PERL PHP searching displaying

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