warning: call_user_func_array() expects parameter 1 to be a valid callback, func

  • Resolved jaspervdv

    (@jaspervdv)


    3 years, 7 months ago

    Hello,

    I got the following warning when I visit my home page on mobile: Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘child_enqueue_styles’ not found or invalid function name in /home/customer/www/drone-optiek.nl/public_html/wp-includes/class-wp-hook.php on line 307.

    I have no experience with the theme editor and I don’t use it. Still this error appeared. I recently re-installed the Astra Child Theme and updated some plugins. I deactivated all the plugins but that did nothing.

    The page I need help with: [log in to see the link]

Viewing 15 replies - 1 through 15 (of 61 total)
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  • Benedikt Ledl

    (@benniledl)

    3 years, 7 months ago

    Hello,
    I think the (non-existent) function “child_enqueue_styles” is hooked to some filter hook, try searching in all your files for “child_enqueue_styles” if there is something like this:
    “add_filter(“some_wp_hook”, “child_enqueue_styles”)”
    Try to comment that out, if you don’t know how to comment something out please post a little snippet of the code

    If you have ssh access search for “child_enqueue_styles” in /home/customer/www like this: grep -R “child_enqueue_styles”

    If you don’t have ssh access try searching in the function.php file of wordpress and your themes

    Thread Starter jaspervdv

    (@jaspervdv)

    3 years, 7 months ago

    Hello Benni,

    Thanks for your response. When I go to my theme editor > Astra child > functions.php I see the following code:

    function child_enqueue_styles() {

	wp_enqueue_style( 'astra-child-theme-css', get_stylesheet_directory_uri() . '/style.css', array('astra-theme-css'), CHILD_THEME_ASTRA_CHILD_VERSION, 'all' );

}
add_action( 'wp_enqueue_scripts', 'child_enqueue_styles', 15 );

    It has probably something to do with this part, but I am not sure and I dont know how to fix it. I got a screenshot but I can’t add it to this post. I tried deleting this code, but the error kept showing up.

    • This reply was modified 3 years, 7 months ago by jaspervdv.
    Benedikt Ledl

    (@benniledl)

    3 years, 7 months ago

    Hi,
    I am not sure if this is really the line that causes this problem,
    try to temporarily delete only the last line that you posted please.
    add_action( ‘wp_enqueue_scripts’, ‘child_enqueue_styles’, 15 );

    Thread Starter jaspervdv

    (@jaspervdv)

    3 years, 7 months ago

    Just tried it, but without succes. The error should disappear immediately after the problem is solved, right?

    Benedikt Ledl

    (@benniledl)

    3 years, 7 months ago

    Yes it should disappear immediately.
    I think this line is not the right one i think the problem should start with add_filter(
    try searching for that.
    Do you have a child theme?

    Thread Starter jaspervdv

    (@jaspervdv)

    3 years, 7 months ago

    The normal Astra theme is active now, but I also got the Astra Child Theme installed. I can select the Astra theme and the Astra child theme in the theme editor.

    Is there a quick way to search for the filter or do I have to manually look into all the files?

    Benedikt Ledl

    (@benniledl)

    3 years, 7 months ago

    If you have access to ssh his should do it otherwise you would have to search it:
    grep -R “child_enqueue_styles”

    Can you deactivate the Child Theme? Try that before manually searching

    Thread Starter jaspervdv

    (@jaspervdv)

    3 years, 7 months ago

    I now deleted the Astra child theme, so I only use the parent theme. No luck yet unfortunately.Using ssh or grep -r is too advacned for me, as I have no experience with the theme editor. That’s why it is so weird this error suddenly shows up.

    Benedikt Ledl

    (@benniledl)

    3 years, 7 months ago

    Please enable debugging mode and send me the debug log,

    search for this line:
    define( ‘WP_DEBUG’, false);

    and replace it with this:

    define( ‘WP_DEBUG_DISPLAY’, true ); #keep Displaying Errors on site for remote maintenance, SET TO FALSE IF NOONE NEEDS TO SEE THE ERRORS
    define( ‘WP_DEBUG_LOG’, true ); #log errors in /wp-content/debug.log

    you can just paste those lines, everything after # is a comment and is not treated by php

    Thread Starter jaspervdv

    (@jaspervdv)

    3 years, 7 months ago

    I found this on line 303 to 310 in /home/customer/www/drone-optiek.nl/public_html/wp-includes/class-wp-hook.php: 

    // Avoid the array_slice() if possible.
				if ( 0 == $the_['accepted_args'] ) {
					$value = call_user_func( $the_['function'] );
				} elseif ( $the_['accepted_args'] >= $num_args ) {
					$value = call_user_func_array( $the_['function'], $args );
				} else {
					$value = call_user_func_array( $the_['function'], array_slice( $args, 0, (int) $the_['accepted_args'] ) );
				}

    This is line 307: $value = call_user_func_array( $the_[‘function’], $args );

    I just found the define( ‘WP_DEBUG’, false); in the file wp-config-sample.php.

    • This reply was modified 3 years, 7 months ago by jaspervdv.
    • This reply was modified 3 years, 7 months ago by jaspervdv.
    Benedikt Ledl

    (@benniledl)

    3 years, 7 months ago

    somewhere in the wp-config.php should be that line, if it is not there just add the code that I posted

    Thread Starter jaspervdv

    (@jaspervdv)

    3 years, 7 months ago

    I added the code in the wp-config.php. But it didn’t help. I changed define( ‘WP_DEBUG’, false); in the wp-config-sample.php to define( ‘WP_DEBUG’, true); but that also didnt help. The error still shows up 🙁

    Benedikt Ledl

    (@benniledl)

    3 years, 7 months ago

    yes, the error will still show but this should give us more detailed error messages, please turn WP_DEBUG_LOG to true like this:
    define( ‘WP_DEBUG_LOG’, true );
    and then send me the debug log in /wp-content/debug.log

    Thread Starter jaspervdv

    (@jaspervdv)

    3 years, 7 months ago

    I can’t find a file named debug.log. The only thing I found is this: wp-admin/includes/class-wp-debug-data.php.

    Benedikt Ledl

    (@benniledl)

    3 years, 7 months ago

    okay, do you have ssh access? if yes just type: grep -R “child_enqueue_styles”
    and send the whole output to me

Viewing 15 replies - 1 through 15 (of 61 total)
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