How can PHP be used to search for a specific string in a TXT file and display the content of the matching line?

To search for a specific string in a TXT file and display the content of the matching line using PHP, you can read the file line by line and check each line for the desired string. If a match is found, you can display or store that line. You can achieve this by using functions like fopen(), fgets(), and strpos() in PHP. 

<?php
$filename = 'example.txt';
$searchString = 'specific string';

$handle = fopen($filename, "r");
if ($handle) {
    while (($line = fgets($handle)) !== false) {
        if (strpos($line, $searchString) !== false) {
            echo $line;
            break; // If you only want to display the first matching line
        }
    }
    fclose($handle);
} else {
    echo "Error opening the file.";
}
?>

Keywords

PHP file handling fopen fgets strpos

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