array_merge和+號合併數組的區別

array_merge和+號合併數組的區別 先看栗子:php array_merge $a = [51 => 12345]; $b = [10 => 5678]; $c = []; $c = array_merge($c,$a,$b); // Array ( [0] => 12345 [1] => 5678 ) $a = [51 => 12345]; $b = [51 => 5678]; $c

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