Title: preg_replace error?
Last modified: August 19, 2016

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# preg_replace error?

 *  [nickc25](https://wordpress.org/support/users/nickc25/)
 * (@nickc25)
 * [15 years ago](https://wordpress.org/support/topic/preg_replace-error/)
 * Hi
    I have a site which I am currently testing but at the top I am getting this
   error:
 * Warning: preg_replace() [function.preg-replace]: Unknown modifier ‘a’ in /home/
   widneswe/public_html/nctest.co.uk/anfield/wp-content/themes/anfieldindex/header.
   php on line 92
 * When I look on header.php line 92 there is no ‘a’ modifier.
 * Code`<nav id=”main-menu”>
    <?php echo preg_replace(array( ‘/\t/’, // remove tabs‘/’.
   str_replace(‘//’,’\/\/’, get_bloginfo(‘url’)).’/i’, // remove full URL ‘/current_page_item\
   s*/i’, ‘/current_page_ancestor\s*/i’, ‘/current_page_parent\s*/i’, ‘/page_item\
   s+/i’, ‘/page-item-\d+\s*/i’, ‘/children\s*/i’, ‘/\s*class=[“\’][“\’]/i’, // 
   empty classes ‘/\s*title=”[^”]+”/i’, // all titles ‘/\s+>/i’, ‘/div>/i’ // change
   div to nav ), array( ”, ”, ‘active’, ‘open’, ”, ”, ”, ”, ”, ”, ‘>’, ‘nav>’ ),
   wp_nav_menu(array(‘container’ => ”, ‘theme_location’ => header, ‘menu_class’ 
   => ”, ‘echo’ => false)) ); ?> </nav> `
 * The only part of code which has preg in it is this section from line 61 onwards
   to closing at line 94. I think it is to do with the menu but not fully sure, 
   does anyone have an idea on this?
    Thanks

Viewing 1 replies (of 1 total)

 *  [vtxyzzy](https://wordpress.org/support/users/vtxyzzy/)
 * (@vtxyzzy)
 * [15 years ago](https://wordpress.org/support/topic/preg_replace-error/#post-1968307)
 * I think your problem is in the str_replace line:
 * `'/'.str_replace('//','\/\/', get_bloginfo('url')).'/i', // remove full URL`
 * It is replacing the double slashes after http:, but not the single slashes in
   the following parts of the URL. My guess is that part of the URL looks something
   like this:
 * `http://mysite.com/apage/` and the a in apage is what is being reported in the
   error message.

Viewing 1 replies (of 1 total)

The topic ‘preg_replace error?’ is closed to new replies.

 * In: [Fixing WordPress](https://wordpress.org/support/forum/how-to-and-troubleshooting/)
 * 1 reply
 * 2 participants
 * Last reply from: [vtxyzzy](https://wordpress.org/support/users/vtxyzzy/)
 * Last activity: [15 years ago](https://wordpress.org/support/topic/preg_replace-error/#post-1968307)
 * Status: not resolved

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