betterCode() PHP 2025

    openlog

    (PHP 4, PHP 5, PHP 7, PHP 8)

    openlog — Open connection to system logger

    Опис

    openlog(string $prefix, int $flags, int $facility): true

    openlog() opens a connection to the system logger for a program.

    The use of openlog() is optional. It will automatically be called by syslog() if necessary, in which case prefix will default to the empty string.

    Параметри

    prefix

    The string prefix is added to each message.

    flags

    Bitmask of the following constants:

    facility

    The facility argument is used to specify what type of program is logging the message. This lets the configuration file specify that messages from different facilities will be handled differently. Must be one of the following constants:

    Зауваження: This parameter is ignored on Windows.

    Значення, що повертаються

    Завжди повертає true.

    Журнал змін

    Версія Опис
    8.2.0 The function now always returns true. Previously it returned false on failure.

    Прогляньте також

    Found A Problem?

    Learn How To Improve This Page • Submit a Pull Request • Report a Bug
    ＋add a note

    User Contributed Notes 1 note

    up
    1
    Nimja
    12 years ago
    To those curious; switching between different facilities is NOT an issue. There is no apparent memory overhead (nor slowdown) by calling openlog multiple(12 * 10000) times.

    Shown by this example:

    <?php
    $facilities     = array(
    LOG_AUTH,
    LOG_AUTHPRIV,
    LOG_CRON,
    LOG_DAEMON,
    LOG_KERN,
    LOG_LOCAL0,
    LOG_LPR,
    LOG_MAIL,
    LOG_NEWS,
    LOG_SYSLOG,
    LOG_USER,
    LOG_UUCP,
    );

    for (    $i = 0; $i < 10000; $i++) {
    foreach (    $facilities as $facility) {
    openlog('test', LOG_PID, $facility);
    syslog(LOG_ERR, "This is a test: " . memory_get_usage(true));
    }
    }
    ?>
    ＋add a note
    To Top