What function or command can be used to specify which lines to read from a file and write to another file in PHP?

To specify which lines to read from a file and write to another file in PHP, you can use a combination of file handling functions like `fgets()` to read individual lines and `fwrite()` to write those lines to the new file. You can keep track of the line numbers you want to read/write and only process those lines accordingly. 

$sourceFile = 'source.txt';
$destinationFile = 'destination.txt';

$linesToCopy = [1, 3, 5]; // Specify the line numbers to copy

$sourceHandle = fopen($sourceFile, 'r');
$destinationHandle = fopen($destinationFile, 'w');

$lineNumber = 1;
while (!feof($sourceHandle)) {
    $line = fgets($sourceHandle);
    if (in_array($lineNumber, $linesToCopy)) {
        fwrite($destinationHandle, $line);
    }
    $lineNumber++;
}

fclose($sourceHandle);
fclose($destinationHandle);

Keywords

file handling read file write file specific lines PHP function

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