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    <span class="function"><a href="function.posix-access.php" class="function">posix_access()</a></span> constants
    PHP Manual
    PHP Manual»Predefined Constants»posix_access constants

    Note:

    Please note that some of these constants may not be available on every system.

    POSIX_F_OK (int)
    Check whether the file exists.
    POSIX_R_OK (int)
    Check whether the file exists and has read permissions.
    POSIX_W_OK (int)
    Check whether the file exists and has write permissions.
    POSIX_X_OK (int)
    Check whether the file exists and has execute permissions.
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