This question already has an answer here:
If I have this array:
array(" hey ", "bla ", " test");
and I want to trim all of them, How can I do that?
The array after the trim:
array("hey", "bla", "test");
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array_map() is what you need:
$result = array_map('trim', $source_array);
array_map() applies a given callback to every value of an array and return the results as a new array.
$array = array_map('trim', $array);