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Server IP : 79.136.114.73 / Your IP : 3.135.209.180 Web Server : Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.29 OpenSSL/1.0.1f System : Linux b8009 3.13.0-170-generic #220-Ubuntu SMP Thu May 9 12:40:49 UTC 2019 x86_64 User : www-data ( 33) PHP Version : 5.5.9-1ubuntu4.29 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority, MySQL : ON | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : ON Directory : /proc/self/root/home/b8009/php-5.6.22/ext/standard/tests/array/ |
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--TEST-- Test array_key_exists() function : usage variations - equality test for certain data types --FILE-- <?php /* Prototype : bool array_key_exists(mixed $key, array $search) * Description: Checks if the given key or index exists in the array * Source code: ext/standard/array.c * Alias to functions: key_exists */ /* * Pass certain data types that can be taken as a key in an array * and test whether array_key_exists(() thinks they are equal and therefore * returns true when searching for them */ echo "*** Testing array_key_exists() : usage variations ***\n"; $unset = 10; unset($unset); $array = array ('null' => null, 'NULL' => NULL, 'empty single quoted string' => '', "empty double quoted string" => "", 'undefined variable' => @$undefined, 'unset variable' => @$unset); //iterate through original array foreach($array as $name => $input) { $iterator = 1; echo "\n-- Key in \$search array is : $name --\n"; $search[$input] = 'test'; //iterate through array again to see which values are considered equal foreach($array as $key) { echo "Iteration $iterator: "; var_dump(array_key_exists($key, $search)); $iterator++; } $search = null; } echo "Done"; ?> --EXPECTF-- *** Testing array_key_exists() : usage variations *** -- Key in $search array is : null -- Iteration 1: bool(true) Iteration 2: bool(true) Iteration 3: bool(true) Iteration 4: bool(true) Iteration 5: bool(true) Iteration 6: bool(true) -- Key in $search array is : NULL -- Iteration 1: bool(true) Iteration 2: bool(true) Iteration 3: bool(true) Iteration 4: bool(true) Iteration 5: bool(true) Iteration 6: bool(true) -- Key in $search array is : empty single quoted string -- Iteration 1: bool(true) Iteration 2: bool(true) Iteration 3: bool(true) Iteration 4: bool(true) Iteration 5: bool(true) Iteration 6: bool(true) -- Key in $search array is : empty double quoted string -- Iteration 1: bool(true) Iteration 2: bool(true) Iteration 3: bool(true) Iteration 4: bool(true) Iteration 5: bool(true) Iteration 6: bool(true) -- Key in $search array is : undefined variable -- Iteration 1: bool(true) Iteration 2: bool(true) Iteration 3: bool(true) Iteration 4: bool(true) Iteration 5: bool(true) Iteration 6: bool(true) -- Key in $search array is : unset variable -- Iteration 1: bool(true) Iteration 2: bool(true) Iteration 3: bool(true) Iteration 4: bool(true) Iteration 5: bool(true) Iteration 6: bool(true) Done