What are the potential pitfalls of inserting data into the first line of a CSV file in PHP?

Potential pitfalls of inserting data into the first line of a CSV file in PHP include overwriting existing data, not properly formatting the data, and not handling headers correctly. To solve this, you can read the existing data first, insert the new data at the beginning, and then write the updated data back to the CSV file. 

// Read existing data from CSV file
$filename = 'data.csv';
$data = file($filename);

// Insert new data at the beginning
$newData = "New Data\n";
array_unshift($data, $newData);

// Write updated data back to CSV file
file_put_contents($filename, implode("", $data));

Keywords

PHP CSV file fputcsv file handling error handling

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