coaleace operator
$a = NULL;
$b = 0;
$c = 2;
echo $a ?? $b; // 0
echo $c ?? $b; // 2
echo $a ?? $b ?? $c; // 0
echo $a ?? $x ?? $c; // 2coaleace operator
$a = NULL;
$b = 0;
$c = 2;
echo $a ?? $b; // 0
echo $c ?? $b; // 2
echo $a ?? $b ?? $c; // 0
echo $a ?? $x ?? $c; // 2Copyright © 2021 Codeinu
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