PHP Notice: Undefined offset error when importing from .csv [duplicate] - php

Question

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"Notice: Undefined variable", "Notice: Undefined index", "Warning: Undefined array key", and "Notice: Undefined offset" using PHP
(29 answers)
Closed 5 years ago.
I'm continually getting the above error when importing data from csv using the following code:
$csv_data=file_get_contents("data3_received.csv");
foreach(preg_split("/((\r?\n)|(\r\n?))/", $csv_data) as $line){
list($service_id, $ki3) = explode(',', $line,2);
The data imports as expected but the error log is filling up as we utilise the same code in multiple php scripts. The error is on the following line:
list($service_id, $ki3) = explode(',', $line,2);
Tried using the suggestion here: Undefined offset error on php when importing a CSV to no avail, and other on the site.
Any help with this would be most welcome.

Answer 1

Since list() is attempting to assign two variables it is attempting to access two array elements [0] and [1]. Because there is no comma on the line, [1] does not exist.
Try some different functions:
$csv_data = file("data3_received.csv", FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
foreach($csv_data as $line) {
$data[] = str_getcsv($line);
}
To get individual variables you need to check if you have more than one column, or something similar:
if(count($data = str_getcsv($line)) > 1) {
list($service_id, $ki3) = $data;
} else {
$service_id = $data[0];
}