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get_defined_vars() The function returns an array composed of all defined variables.
Version requirement: PHP 4 => 4.0.4, PHP 5, PHP 7
array get_defined_vars ( void )
Parameter description:
void.
Returns a multidimensional array containing a list of all defined variables, including environment variables, server variables, and user-defined variables.
<?php $b = array(1,1,2,3,5,8); $arr = get_defined_vars(); // Print $b print_r($arr["b"]); // Print the path of the PHP interpreter (if PHP is used as CGI) // For example:/usr/local/bin/php echo $arr["_"]; // Print command line parameters (if any) print_r($arr["argv"]); // Print all server variables print_r($arr["_SERVER"]); // Print all available keys of the variable array print_r(array_keys(get_defined_vars())); ?>
The execution result is shown as follows:
Array ( [0]]=> 1 [1]]=> 1 [2]]=> 2 [3]]=> 3 [4]]=> 5 [5]]=> 8 ) Array ( [0]]=> /tmp/543750210/main.php ) Array ( [PATH]]=> /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin [HOSTNAME]]=>glot-runner [PHPIZE_DEPS]]=>autoconf dpkg-dev file g++ gcc libc-dev make pkg-config re2c [PHP_INI_DIR]]=> /usr/local/etc/php [PHP_CFLAGS]]=> -fstack-protector-strong -fpic -fpie -O2 [PHP_CPPFLAGS]]=> -fstack-protector-strong -fpic -fpie -O2 [PHP_LDFLAGS]]=> -Wl,-O1 -Wl,--hash-style=both -pie [GPG_KEYS]]=> 1729F83938DA44E27BA0F4D3DBDB397470D12172 B1B44D8F021E4E2D6021E995DC9FF8D3EE5AF27F [PHP_VERSION]]=> 7.2.1 [PHP_URL]]=>https://secure.php.net/get/php-7.2.1.tar.xz/from/this/mirror [PHP_ASC_URL]]=>https://secure.php.net/get/php-7.2.1.tar.xz.asc/from/this/mirror [PHP_SHA256]]=> 6c6cf82fda6660ed963821eb0525214bb3547e8e29f447b9c15b2d8e6efd8822 [PHP_MD5]]=> [HOME]]=> /home/glot [PHP_SELF]]=> /tmp/543750210/main.php [SCRIPT_NAME]]=> /tmp/543750210/main.php [SCRIPT_FILENAME]]=> /tmp/543750210/main.php [PATH_TRANSLATED]]=> /tmp/543750210/main.php [DOCUMENT_ROOT]]=> [REQUEST_TIME_FLOAT]]=> 1524198667.12 [REQUEST_TIME]]=> 1524198667 [argv]]=>Array ( [0]]=> /tmp/543750210/main.php ) [argc]]=> 1 ) Array ( [0]]]=>_GET [1]]=>_POST [2]]=>_COOKIE [3]]=>_FILES [4]]=>argv [5]]=>argc [6]]=>_SERVER [7]]=>b [8]]=>arr )