affect variable

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LEARN ABOUT PHP

apc_add

APC_ADD(3)								 1								APC_ADD(3)

apc_add - Cache a new variable in the data store

SYNOPSIS

       bool apc_add (string  $key, mixed  $var, [int  $ttl])

DESCRIPTION

       array apc_add (array  $values, [mixed  $unused = NULL], [int  $ttl])

	Caches a variable in the data store, only if it's not already stored.

       Note

	       Unlike  many  other  mechanisms in PHP, variables stored using apc_add(3) will persist between requests (until the value is removed
	      from the cache).

PARAMETERS

	      o $key
		- Store the variable using this name. $keys are cache-unique, so attempting to use apc_add(3)  to  store  data	with  a  key  that
		already  exists  will  not  overwrite  the  existing  data,  and  will	instead return FALSE. (This is the only difference between
		apc_add(3) and apc_store(3).)

	      o $var
		- The variable to store

	      o $ttl
		- Time To Live; store $var in the cache for $ttl seconds. After the $ttl has passed, the stored variable will be expunged from the
		cache  (on  the  next  request). If no $ttl is supplied (or if the $ttl is 0), the value will persist until it is removed from the
		cache manually, or otherwise fails to exist in the cache (clear, restart, etc.).

	      o $values
		- Names in key, variables in value.

RETURN VALUES

	Returns TRUE if something has effectively been added into the cache, FALSE otherwise. Second syntax returns array with error keys.

EXAMPLES

       Example #1

	      A apc_add(3) example

	      <?php
	      $bar = 'BAR';
	      apc_add('foo', $bar);
	      var_dump(apc_fetch('foo'));
	      echo "
";
	      $bar = 'NEVER GETS SET';
	      apc_add('foo', $bar);
	      var_dump(apc_fetch('foo'));
	      echo "
";
	      ?>

	      The above example will output:

	      string(3) "BAR"
	      string(3) "BAR"

SEE ALSO

       apc_store(3), apc_fetch(3), apc_delete(3).

PHP Documentation Group 														APC_ADD(3)

Shell Programming and Scripting