How To Delete The Top 100 Rows From a CSV File With PHP

Question

I have a php script running on a regular basis that processes the top 100 rows of a CSV file. When it is done I want it to delete the processed rows from the CSV file.

I

Answer 1

Here is php code for that:

$input = explode("\n", file_get_contents("file.csv"));
foreach ($input as $line) {
 // process all lines.
}

// This function removes first 100 elements.
// More info:
// http://php.net/manual/en/function.array-slice.php
$output = array_slice($input, 100);
file_put_contents("out.csv", implode("\n", $output));

Note, if csv file contains header you have to remove first element from array $input.