原文链接：http://www.if-not-true-then-false.com/2012/php-apc-configuration-and-usage-tips-and-tricks/3/

 

This PHP APC guide is divided on four different section:

3. Howto Use PHP APC User Cache

 

3. Howto Use PHP APC User Cache Examples

3.1 PHP APC User Cache Example with Numeric Values

Here is an example howto use apc_add, apc_cas, apc_fetch, apc_dec and apc_inc:

         ";     // Update old value with a new value    apc_cas('num', 1, 10);     // Print just updated value    echo "Updated value: ", apc_fetch('num'), "
";     // Decrease a stored number    echo "Decrease 1: ", apc_dec('num'), "
";    echo "Decrease 3: ", apc_dec('num', 3), "
";     // Increase a stored number    echo "Increase 2: ", apc_inc('num', 2), "
";    echo "Increase 1: ", apc_inc('num'), "
";?>

Output:

Initial value: 1Updated value: 10Decrease 1: 9Decrease 3: 6Increase 2: 8Increase 1: 9

 

3.2 PHP APC User Cache Example with String

This example shows howto use apc_fetch, apc_exists, apc_store, apc_clear_cache:

         ";        // Clear cache        apc_clear_cache('user');        // Try to fetch str again        echo "str from cache, after user cache is cleared: ", "
";        var_dump(apc_fetch('str'));    }    else {
                // Save str to cache and set ttl 120 seconds        echo 'str not found from cache...saving', "
";        $str = "This is just test";        apc_store('str', $str, 120);    }?>

First run output:

str not found from cache...saving

Second run output:

str from cache: This is just test

 

3.3 PHP APC User Cache Example with Array

         ";        print_r($arr);    }    else {
                echo 'arr not found from cache...saving', "
";        $arr = array('Test 1', 'Test 2', 'Test 3');        apc_add('arr', $arr, 120);    }?>

First run output:

arr not found from cache...saving

Second run output:

arr from cache:Array ( [0] => Test 1 [1] => Test 2 [2] => Test 3 )

 

3.3 PHP APC User Cache Example with Object

         name = $name;        }         public function setAge($age) {
                    $this->age = $age;        }         public function getName() {
                    return $this->name;        }         public function getAge() {
                    return $this->age;        }    }     // Check if Person object found from cache    if ($obj = apc_fetch('person')) {
                echo "Person data from cache: ", "
";        echo "Name: ", $obj->getName(), "
";        echo "Age: ", $obj->getAge(), "
";    }    else {
                echo 'Person data not found from cache...saving', "
";        $obj = new Person;        $obj->setName('Test Person');        $obj->setAge(35);        apc_add('person', $obj, 3600);    }?>

First run output:

Person data not found from cache...saving

Second run output:

Person data from cache: Name: Test PersonAge: 35

 

This PHP APC guide is divided on four different section:

3. Howto Use PHP APC User Cache