Undefined offset error, new with building arrays

Question

I am learning arrays and put this together...it works meaning I get the results I want but I am getting undefined offset errors.

$err_array = array();
$err_array[0] = array('Step 1 and 2 are empty.','chu'); 
$err_array[1] = array('Step 1 is empty (but optional) a','Step 1 is empty (but optional)'); 
$err_array[2] = array(' Step 2 is empty (and required)','Step 2 is empty (and required)'); 
$err_array[3] = array(' Step 3 is empty (and required)','Step 3 is empty (and required'); 
$err_array[4] = array(' Step 4 is empty (and optional)','Step 4 is empty (and optional)'); 
        
    # Set text color of error msg
    $counter = 0;   
        
# line 16   while (is_array($err_array[$counter]) ) {   
                $err_[$counter]     = ''.$err_array[$counter][0].''; 
# line 18       $err__[$counter]    = ''.$err_array[$counter][1].'';
            $counter++; 
            }

Here is the erors:

Notice: Undefined offset: 5 in /nfs/c08/h04/mnt/124078/domains/yourinternetfootprint.com/html/wp-content/plugins/wordpress_meta_box_sample_files/includes/template_yif_ealfm_get_rss_feed_parameters.php on line 16

Notice: Undefined offset: 1 in /nfs/c08/h04/mnt/124078/domains/yourinternetfootprint.com/html/wp-content/plugins/wordpress_meta_box_sample_files/includes/template_yif_ealfm_get_rss_feed_parameters.php on line 18

I know there is a cleaner way to approach taking the errors messages and assigning them to varables and wrapping some css around them...but as I said I am learning.

Check if the offset you're trying to read actually exists. while (isset($err_array[$counter]) && is_array($err_array[$counter]) ). — user1233508
– user1233508, Commented Jun 2, 2012 at 4:28

Ja͢ck · Accepted Answer · 2012-06-02 06:38:39Z

1

To properly iterate over $err_array you should use foreach:

foreach ($err_array as $counter => $errors) {
    if (isset($errors[0])) { // make sure $errors[0] exists
        $err_[$counter] = $errors[0];
    }
    if (isset($errors[1])) { // make sure $errors[1] exists
        $err__[$counter] = $errors[1];
    }
}

answered Jun 2, 2012 at 6:38

Ja͢ck

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2 Comments

Jason Over a year ago

Jack, that makes so much more since...thanks. It worked and now the error is gone.

Ja͢ck Over a year ago

@jason that's good to know :) please accept the answer when you're happy with it.

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