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<?php // given: $undef = "0"; //unset($undef); $null = NULL; $false = FALSE; $true = TRUE; // these operations: var_dump(isset($undef)); var_dump(empty($undef)); var_dump(array_key_exists('undef', $GLOBALS)); // "defined" below
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) bool(true) bool(true)

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