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    User Contributed Notes 2 notes

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    7
    makr at makrit dot net
    11 years ago
    shmop made simple:
    $test=get_cache('test');
    save_cache($test, 'test1', 600);

    To save/get cache that easily just save this as cache.php or whatever you see fit:

    <?php

    function save_cache($data, $name, $timeout) {
    // delete cache
    $id=shmop_open(get_cache_id($name), "a", 0, 0);
    shmop_delete($id);
    shmop_close($id);

    // get id for name of cache
    $id=shmop_open(get_cache_id($name), "c", 0644, strlen(serialize($data)));

    // return int for data size or boolean false for fail
    if ($id) {
    set_timeout($name, $timeout);
    return     shmop_write($id, serialize($data), 0);
    }
    else return     false;
    }

    function     get_cache($name) {
    if (!    check_timeout($name)) {
    $id=shmop_open(get_cache_id($name), "a", 0, 0);

    if (    $id) $data=unserialize(shmop_read($id, 0, shmop_size($id)));
    else return     false; // failed to load data

    if ($data) { // array retrieved
    shmop_close();
    return     $data;
    }
    else return     false; // failed to load data
    }
    else return     false; // data was expired
    }

    function     get_cache_id($name) {
    // maintain list of caches here
    $id=array( 'test1' => 1
    'test2' => 2
    );

    return     $id[$name];
    }

    function     set_timeout($name, $int) {
    $timeout=new DateTime(date('Y-m-d H:i:s'));
    date_add($timeout, date_interval_create_from_date_string("$int seconds"));
    $timeout=date_format($timeout, 'YmdHis');

    $id=shmop_open(100, "a", 0, 0);
    if (    $id) $tl=unserialize(shmop_read($id, 0, shmop_size($id)));
    else     $tl=array();
    shmop_delete($id);
    shmop_close($id);

    $tl[$name]=$timeout;
    $id=shmop_open(100, "c", 0644, strlen(serialize($tl)));
    shmop_write($id, serialize($tl), 0);
    }

    function     check_timeout($name) {
    $now=new DateTime(date('Y-m-d H:i:s'));
    $now=date_format($now, 'YmdHis');

    $id=shmop_open(100, "a", 0, 0);
    if (    $id) $tl=unserialize(shmop_read($id, 0, shmop_size($id)));
    else return     true;
    shmop_close($id);

    $timeout=$tl[$name];
    return (    intval($now)>intval($timeout));
    }

    ?>
    up
    2
    mattcsl at gmail dot com
    11 years ago
    thankyou,

    this function had a missing comma between test1 and test2 and is fixed below

    function get_cache_id($name) {
    // maintain list of caches here
    $id=array( 'test1' => 1,
    'test2' => 2
    );

    return $id[$name];
    }
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