PHP Strict Errors

Question

I get these PHP errors in error_log all the time and can't figure out how to solve it:

Errors:

PHP Strict Standards:  Non-static method wf_gmap::check_wp_footer() should not be called statically in /home/USERNAME/public_html/WEBSITE/wp-content/plugins/5sec-google-maps/5sec-gmaps.php on line 25

PHP Notice:  Use of undefined constant is_admin - assumed 'is_admin' in /home/USERNAME/public_html/WEBSITE/wp-content/plugins/5sec-google-maps/5sec-gmaps.php on line 21

PHP Strict Standards:  call_user_func_array() expects parameter 1 to be a valid callback, non-static method wf_gmap::init() should not be called statically in /home/USERNAME/public_html/WEBSITE/wp-includes/plugin.php on line 429

and 5sec-gmaps.php file's lines from 17 to 44 is this:

class wf_gmap {
  static $js_functions = '';

public function init() {
if(is_admin) {
  add_filter('plugin_row_meta', array(__CLASS__, 'plugin_meta_links'), 10, 2);
}
// check wp_footer()
self::check_wp_footer();

// add shortcode
global $shortcode_tags;
if (isset($shortcode_tags[GMAP_SHORTCODE])) {
  add_action('admin_footer', array(__CLASS__, 'warning'));
} else {
  add_shortcode(GMAP_SHORTCODE, array(__CLASS__, 'shortcode'));
}

// add JS include files
add_action('wp_footer', array(__CLASS__, 'footer'), 2);

// add shortcode support in sidebar text widget
if (has_filter('widget_text', 'do_shortcode') === false) {
  add_filter('widget_text', 'do_shortcode');
}

return;

and plugin.php's line from 418 to 434:

    // Sort
if ( !isset( $merged_filters[ $tag ] ) ) {
    ksort($wp_filter[$tag]);
    $merged_filters[ $tag ] = true;
}

reset( $wp_filter[ $tag ] );

do {
    foreach ( (array) current($wp_filter[$tag]) as $the_ )
        if ( !is_null($the_['function']) )
            call_user_func_array($the_['function'], array_slice($args, 0, (int) $the_['accepted_args']));

} while ( next($wp_filter[$tag]) !== false );

array_pop($wp_current_filter);

Any help would be appreciated.

is_admin() needs the brackets to show it's a function, not a constant. — Ben Fortune
– Ben Fortune, Commented Oct 30, 2013 at 10:08
thank you Ben, changing it to if(is_admin()) fixed the notice. — Jim Creed
– Jim Creed, Commented Oct 30, 2013 at 10:33

marekful · Accepted Answer · 2013-10-30 10:13:31Z

1

You are invoking member methods with static context.

self::check_wp_footer(); should be $this->check_wp_footer();

Likewise, whatever $the_['function'] must be referring to a static method as well.

edited Oct 30, 2013 at 10:13

answered Oct 30, 2013 at 10:06

marekful

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2 Comments

Jim Creed Over a year ago

Marcell, when i change it to $this->check_wp_footer(); the whole page breaks.

marekful Over a year ago

In the provided code, there's no declaration of check_wp_footer. The entire source code quotation is messy, cannot tell much about it. Edit the code and provide the full class declaration, make sure braces are terminated and please do proper indentation.

Bhumi Shah · Accepted Answer · 2013-10-30 10:07:01Z

0

PHP Strict Standards: Non-static method wf_gmap::check_wp_footer() should

means function check_wp_footer is not static method so you can't call like this

answered Oct 30, 2013 at 10:07

Bhumi Shah

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