douyuefu1372 2017-01-13 16:41
浏览 82
已采纳

WordPress - add_filter函数和字符串参数?

I found this filter in a piece of code:

$output  = apply_filters( 'envira_gallery_output_dynamic_position', $output, $id, $item, $data, $i, 'bottom-right' );

My assumption was, that I can make use of it like this:

add_filter( 'envira_gallery_output_dynamic_position', 'custom_gallery_output_dynamic_position', 10, 6);

function custom_gallery_output_dynamic_position($output, $id, $item, $data, $i, 'bottom-right' ) {

But because of the 'bottom-right' I get a 500 server error:

PHP Parse error:  syntax error, unexpected ''bottom-right'' (T_CONSTANT_ENCAPSED_STRING), expecting variable (T_VARIABLE)

Does anybody know how I can use this filter correctly?

Thanks!

  • 写回答

1条回答 默认 最新

  • duanbiaojin8860 2017-01-13 17:02
    关注

    There must be variable name:

    function custom_gallery_output_dynamic_position($output, $id, $item, $data, $i, $position) {
    

    You can define it with default value:

    function custom_gallery_output_dynamic_position($output, $id, $item, $data, $i, $position='bottom-right') {
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥15 快手联盟怎么快速的跑出建立模型
  • ¥20 ros环境下运行orb-slam一直报错
  • ¥15 关于腾讯云服务器中,PHP页面无法打开的问题
  • ¥60 如何把照片修复成原始拍摄图
  • ¥80 Exited too quickly (process log may have details)
  • ¥15 爬知乎登录之后内容加载不出来
  • ¥15 怎么用protues测量通频带
  • ¥15 zepelin使用sparkInterpreter 异常
  • ¥15 paho mqtt 接收不到消息
  • ¥15 函数r关于两个分量y,z方向上的图像,分开画r随y的图像,r随z的图像