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WordPress短代码实现倒计时显示功能

WordPress短代码实现倒计时显示功能

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function content_countdown($atts, $content = null) {
    extract(shortcode_atts(array(
             'month' => '',
             'day'   => '',
             'year'  => ''
            ), $atts));
    $remain = ceil((mktime( 0,0,0,(int)$month,(int)$day,(int)$year) - time())/86400);
    if( $remain > 1 ) {
        return $daysremain = "<div class=\"event\">Just <b>($remain)</b> days until content is available</div>";
    } else if($remain == 1 ) {
        return $daysremain = "<div class=\"event\">Just <b>($remain)</b> day until content is available</div>";
    } else {
        return $content;
    }
}
add_shortcode('cdt', 'content_countdown');
Shell中判断前一个命令是否执行成功

Shell中判断前一个命令是否执行成功

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Linux Shell中常用的判断语法：

  • -eq　　等于
  • -ne　　不等于
  • -gt　　大于
  • -lt　　小于
  • ge　　大于等于
  • le　　小于等于

代码如下：

if [ $? -ne 0 ]; then

    echo "fail"

else

    echo "success"

fi

或者

if [ $? -eq 0 ]; then

    echo "success"

else

    echo "fail"

fi