1.
$arr = array();
$arr[] = '';
2.
$arr = array();
array_push($arr,'');
I just did a 100,000-time loop insertion, and the result is that the first method is still faster! (Inserting numbers in a loop, 100,000 times, the first type is about 0.04 seconds, the second type is about 0.08 seconds)
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