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apc_define_constants

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(PECL apc >= 3.0.0)

apc_define_constants — Defines a set of constants for retrieval and mass-definition

Description

apc_define_constants ( string $key , array $constants [, bool $case_sensitive = TRUE ] ) : bool

define() is notoriously slow. Since the main benefit of APC is to increase the performance of scripts/applications, this mechanism is provided to streamline the process of mass constant definition. However, this function does not perform as well as anticipated.

For a better-performing solution, try the » hidef extension from PECL.

Note: To remove a set of stored constants (without clearing the entire cache), an empty array may be passed as the constants parameter, effectively clearing the stored value(s).

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Parameters

key

The key serves as the name of the constant set being stored. This key is used to retrieve the stored constants in apc_load_constants().

constants

An associative array of constant_name => value pairs. The constant_name must follow the normal constant naming rules. value must evaluate to a scalar value.

case_sensitive

The default behaviour for constants is to be declared case-sensitive; i.e. CONSTANT and Constant represent different values. If this parameter evaluates to FALSE the constants will be declared as case-insensitive symbols.

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Return Values

Returns TRUE on success or FALSE on failure.

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Examples

Example #1 apc_define_constants() example

<?php
$constants = array(
    'ONE'   => 1,
    'TWO'   => 2,
    'THREE' => 3,
);
apc_define_constants('numbers', $constants);
echo ONE, TWO, THREE;
?>

The above example will output:

123

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See Also

Find a PHP function

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Document created the 30/01/2003, last modified the 26/10/2018
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References

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