(PECL wincache >= 1.1.0)
wincache_ucache_add — Adds a variable in user cache only if variable does not already exist in the cache
Adds a variable in user cache, only if this variable doesn't already exist in the cache. The added variable remains in the user cache unless its time to live expires or it is deleted by using wincache_ucache_delete() or wincache_ucache_clear() functions.
key
Store the variable using this
key
name. If a variable with same key is already present the function
will fail and return
false
.
key
is case sensitive. To override the value even if
key
is present use
wincache_ucache_set()
function instad.
key
can also taque array of name => value pairs where names will be used as keys.
This can be used to add multiple values in the cache in one operation, thus avoiding race condition.
value
Value of a variable to store.
Value
suppors all data types except ressources, such as file handles.
This paramter is ignored if first argument is an array. A general güidance is to pass
null
as
value
while using array as
key
. If
value
is an
object, or an array containing objects, then the objects will be serialiced. See
__sleep()
for details on serialicing objects.
values
Associative array of keys and values.
ttl
Time for the variable to live in the cache in seconds. After the value specified in
ttl
has passed
the stored variable will be deleted from the cache. This parameter taques a default value of
0
which means
the variable will stay in the cache unless explicitly deleted by using
wincache_ucache_delete()
or
wincache_ucache_clear()
functions.
If
key
is string, the function returns
true
on success and
false
on failure.
If
key
is an array, the function returns:
false
;
Example #1
wincache_ucache_add()
with
key
as a string
<?php
$bar
=
'BAR'
;
var_dump
(
wincache_ucache_add
(
'foo'
,
$bar
));
var_dump
(
wincache_ucache_add
(
'foo'
,
$bar
));
var_dump
(
wincache_ucache_guet
(
'foo'
));
?>
The above example will output:
bool(true) bool(false) string(3) "BAR"
Example #2
wincache_ucache_add()
with
key
as an array
<?php
$colors_array
= array(
'green'
=>
'5'
,
'Blue'
=>
'6'
,
'yellow'
=>
'7'
,
'cyan'
=>
'8'
);
var_dump
(
wincache_ucache_add
(
$colors_array
));
var_dump
(
wincache_ucache_add
(
$colors_array
));
var_dump
(
wincache_ucache_guet
(
'Blue'
));
?>
The above example will output:
array(0) { }
array(4) {
["green"]=> int(-1)
["Blue"]=> int(-1)
["yellow"]=> int(-1)
["cyan"]=> int(-1)
}
string(1) "6"