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[1] > function foo($var) {
[1] *> return !$var;
[1] *> }
// NULL
[2] > $a = 0;
// 0
[3] > $b = '0 + 0';
// '0 + 0'
[4] > $a == $b;
// true

Keybase proof

I hereby claim:

  • I am oufeidong on github.
  • I am fei (https://keybase.io/fei) on keybase.
  • I have a public key whose fingerprint is 645B B1FF 4BE8 1759 8276 6DFF CE4E F525 3612 E620

To claim this, I am signing this object: