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I noticed that some arrays don't have a comma after the last item. I have an array:
$first_name = array(
'name' => 'first_name',
'id' => 'first_name',
'maxlength' => '20',
'class' => 'text',
'placeholder' => 'First name',
);
I have a comma but no php errors. Should I keep or remove the comma?
746
You can use the join() method in JavaScript to remove commas from an array. The comma delimiter in an array works as the separator.
Using the Array pop() Method The Array pop() method is the simplest method used to remove the last element in an array. The pop() method returns the removed element from the original array.
JavaScript has allowed trailing commas in array literals since the beginning. Trailing commas are now also allowed in object literals, function parameters, named imports, named exports, and more.
It is a style preference as mentioned elsewhere, however I would advise to condition yourself against adding that trailing comma in PHP, as it is syntactically invalid in some languages. In particular, I'm thinking of Internet Explorer's handling of those types of trailing commas in Javascript, which are notoriously difficult bugs to locate when scripts fail in IE while succeeding everywhere else. It will also break JSON's validity, and is invalid in a SQL SELECT list, among other potential problems.
Again, it's a matter of preference, but could cause you problems in other areas.
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