PHP 5.4.33 Released

Predefined Constants

Core Predefined Constants

These constants are defined by the PHP core. This includes PHP, the Zend engine, and SAPI modules.

PHP_VERSION (string)
The current PHP version as a string in "major.minor.release[extra]" notation.
PHP_MAJOR_VERSION (integer)
The current PHP "major" version as an integer (e.g., int(5) from version "5.2.7-extra"). Available since PHP 5.2.7.
PHP_MINOR_VERSION (integer)
The current PHP "minor" version as an integer (e.g., int(2) from version "5.2.7-extra"). Available since PHP 5.2.7.
PHP_RELEASE_VERSION (integer)
The current PHP "release" version as an integer (e.g., int(7) from version "5.2.7-extra"). Available since PHP 5.2.7.
PHP_VERSION_ID (integer)
The current PHP version as an integer, useful for version comparisons (e.g., int(50207) from version "5.2.7-extra"). Available since PHP 5.2.7.
PHP_EXTRA_VERSION (string)
The current PHP "extra" version as a string (e.g., '-extra' from version "5.2.7-extra"). Often used by distribution vendors to indicate a package version. Available since PHP 5.2.7.
PHP_ZTS (integer)
Available since PHP 5.2.7.
PHP_DEBUG (integer)
Available since PHP 5.2.7.
PHP_MAXPATHLEN (integer)
The maximum length of filenames (including path) supported by this build of PHP. Available since PHP 5.3.0.
PHP_OS (string)
PHP_SAPI (string)
The Server API for this build of PHP. See also php_sapi_name().
PHP_EOL (string)
The correct 'End Of Line' symbol for this platform. Available since PHP 5.0.2
PHP_INT_MAX (integer)
The largest integer supported in this build of PHP. Usually int(2147483647). Available since PHP 5.0.5
PHP_INT_SIZE (integer)
Available since PHP 5.0.5
DEFAULT_INCLUDE_PATH (string)
PEAR_INSTALL_DIR (string)
PEAR_EXTENSION_DIR (string)
PHP_EXTENSION_DIR (string)
PHP_PREFIX (string)
The value "--prefix" was set to at configure.
PHP_BINDIR (string)
Specifies where the binaries were installed into.
PHP_BINARY (string)
Specifies the PHP binary path during script execution. Available since PHP 5.4.
PHP_MANDIR (string)
Specifies where the manpages were installed into. Available since PHP 5.3.7.
PHP_LIBDIR (string)
PHP_DATADIR (string)
PHP_SYSCONFDIR (string)
PHP_LOCALSTATEDIR (string)
PHP_CONFIG_FILE_PATH (string)
PHP_CONFIG_FILE_SCAN_DIR (string)
PHP_SHLIB_SUFFIX (string)
The build-platform's shared library suffix, such as "so" (most Unixes) or "dll" (Windows).
E_ERROR (integer)
Error reporting constant
E_WARNING (integer)
E_PARSE (integer)
E_NOTICE (integer)
E_CORE_ERROR (integer)
E_CORE_WARNING (integer)
E_COMPILE_ERROR (integer)
E_COMPILE_WARNING (integer)
E_USER_ERROR (integer)
E_USER_WARNING (integer)
E_USER_NOTICE (integer)
E_DEPRECATED (integer)
Available since PHP 5.3.0
E_USER_DEPRECATED (integer)
Available since PHP 5.3.0
E_ALL (integer)
E_STRICT (integer)
__COMPILER_HALT_OFFSET__ (integer)
Available since PHP 5.1.0
TRUE (boolean)
See Booleans.
FALSE (boolean)
See Booleans.
NULL (null)
See Null.

See also: Magic constants.

Standard Predefined Constants

All constants from core extensions are defined in PHP by default.

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User Contributed Notes 2 notes

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11
soywiz at gmail dot com
5 years ago
Another way to determine PHP_INT_MIN:

<?php
define
('PHP_INT_MIN', ~PHP_INT_MAX);
?>

It should work always:

MAX for 8bit-signed: 01111111
MIN for 8bit-signed: 10000000

In 32 bits:
php -r"echo (int)base_convert(str_repeat('1', 31), 2, 10) - PHP_INT_MAX;"
0
<?php echo ~(int)base_convert(str_repeat('1', 31), 2, 10); ?>
-2147483648
up
6
rdcapasso
1 year ago
Volker's getOS() function needs to have the order of cases changed in the switch statement since "darwin" contains "win", which means that both "windows" and "darwin" will return self::OS_WIN. I've moved the 'dar' case above the 'win' case:

<?php
class System {

    const
OS_UNKNOWN = 1;
    const
OS_WIN = 2;
    const
OS_LINUX = 3;
    const
OS_OSX = 4;

   
/**
     * @return int
     */
   
static public function getOS() {
        switch (
true) {
            case
stristr(PHP_OS, 'DAR'): return self::OS_OSX;
            case
stristr(PHP_OS, 'WIN'): return self::OS_WIN;
            case
stristr(PHP_OS, 'LINUX'): return self::OS_LINUX;
            default : return
self::OS_UNKNOWN;
        }
    }

}
?>
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