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PhpDig is a PHP MySQL based
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shm_get_var — Fetches and returns a variable from shared memory.


mixed shm_get_var(id, variable_key);
int id: ID of a shared memory segment
int variable_key: Key number of variable to retrieve


Value from shared memory; FALSE on error


shm_get_var() returns the variable identified by variable_key from the shared memory segment identified by shm_id . variable_key must be an integer or evaluate to an integer. If shm_id is not a valid identifier as returned by shm_attach() , or if there is no stored variable with the key given by variable_key , shm_get_var() returns FALSE.


PHP 3 since 3.0.6, PHP 4


Example 1175. Read a stored variable value

if (!$value = @shm_get_var($shm_id, $varkey)) {
    echo "Failed to retrieve variable '$varkey'; reason: $php_errormsg\n";
} else {
    echo "Variable $varname is: $value.\n";

PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at The authors of this book have elected not to choose any options under the OPL. This online book was obtained from and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.

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