array_combine is not working if number of parameter is not same

Question

I am reading data from csv file and combining the array.i have below header in csv

First Name,Last Name,Email,Contact No

And i am giving below data in csv in respect of column

Usertest,name,[email protected],645383638

then using array_combine() to combine the data.in this case its working fine and giving me below result

Array
(
    [First Name] => test
    [Last Name] => name
    [Email] => [email protected]
    [Contact No] => 74647454
)

But if i am leaving contact number blank in csv then array_combine() is not working giving me empty array()

Array
(
 
)

$dataKeys   =   First Name,Last Name,Email,Contact No;
$dataValues = 	Usertest,name,[email protected]
$dataArr = array_combine(str_getcsv($dataKeys), str_getcsv($dataValues));

Because the number of parameter is not same in csv header and data field in row.so am not getting how to fix this.

Warning: array_combine(): Both parameters should have an equal number of elements — Rahul
– Rahul, Commented Feb 22, 2019 at 6:29
The behaviour of array_combine() when the number of provided keys does not match the number of values is documented: " Throws E_WARNING if the number of elements in keys and values does not match." — axiac
– axiac, Commented Feb 22, 2019 at 6:30
You can use array_pad() to fill the values array with '' (or null) to the required length. — axiac
– axiac, Commented Feb 22, 2019 at 6:31
Yes i am geeting this error..Warning: array_combine(): Both parameters should have an equal number of elements..but contact number may be blank in csv,in this case how to handle this? — Sandeep
– Sandeep, Commented Feb 22, 2019 at 6:32

Rahul · Accepted Answer · 2019-02-22 06:31:51Z

7

Whenever you are putting data to csv using array_combine, you can make sure length of both arrays must be the same by the following code.

You can do something like this,

$arr1 = array("First Name", "Last Name", "Email","Contact No");
$arr2 = ["Usertest","name","[email protected]"];
$temp = array_pad($arr2, count($arr1),'');
$res = array_combine($arr1,$temp);
print_r($res);

Output

Array
(
    [First Name] => Usertest
    [Last Name] => name
    [Email] => [email protected]
    [Contact No] => 
)

Demo.

answered Feb 22, 2019 at 6:31

Rahul

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