@adan
To check for duplicate rows in a CSV file using PHP, you can read the CSV file line by line and keep track of the rows you have already processed. Here is a simple example that demonstrates how this can be done:
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$file = 'data.csv'; $handle = fopen($file, 'r'); $rows = array(); while (($data = fgetcsv($handle, 1000, ',')) !== FALSE) { $row = implode(',', $data); // Check if the row already exists in the array if (in_array($row, $rows)) { echo "Duplicate row found: " . $row . PHP_EOL; } else { $rows[] = $row; } } fclose($handle); |
In this code snippet, we open the CSV file using fopen()
and read it line by line using fgetcsv()
. We then convert each row into a string and check if it already exists in the $rows
array. If it does, we output a message indicating a duplicate row has been found. Otherwise, we add the row to the $rows
array.
This is a basic example and can be expanded based on your specific requirements, such as ignoring certain columns or considering only specific fields for checking duplicates.