How can you determine the specific line in a text file where you want to start writing in PHP?

To determine the specific line in a text file where you want to start writing in PHP, you can use the `file()` function to read the contents of the file into an array. Then, you can loop through the array to find the specific line you are looking for based on a condition. Once you have identified the line, you can start writing or appending content to the file from that line onwards. 

$file = 'example.txt';
$lines = file($file);
$desired_line = 5; // Specify the line number you want to start writing from

$fp = fopen($file, 'a');
for ($i = $desired_line - 1; $i < count($lines); $i++) {
    fwrite($fp, $lines[$i]);
}
fclose($fp);

Keywords

file handling fopen fseek ftell fwrite

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