PHP - Warning: Missing Argument 1 For Radio_co :__construct()

I have been scripting (some may say programming) in PHP for last 5 years but never faced this issue. Interesting!

Say for example, I created a custom function with one argument:

function myFunc($arg1) {
echo $arg1;
}

Now, if I call this function without supplying any argument it doesn't give any error/warning. Any other high level language like C++ or Java would produce error in this case. So, I had to modify my code as follows:


function myFunc($arg1) {
if (!isset($arg1)) {
echo "Missing argument 1";
}
echo $s;
}

But this is annoying. Now I have to add these EXTRA lines of code in every function and class methods I have created. Is there any shortcut/easy method that the script will always produce an error if its missing any required argument? I have tried with adding error_reporting(E_ALL); at the very beginning of my code. But it still didn't work out. By the way, I am using PHP 5.3.1 on Apache/2.2.14 (Unix).

Any suggestion will be appreciated.

I am a total newbie at PHP and I have a wordpress plugin that works well but sometimes does not return any results to the query which I believe is causing this error:

Warning: Invalid argument supplied for foreach() social-media-integrated-related-content-smirc/lib/smirclib.php on line 182

From what I am reading on other forums the problem is possibly that the foreach loop is empty since the array must have elements. The solution being  to add a check above the foreach loop, to count the number of elements in the array, and if it is zero, skip the foreach loop. Is this correct? Here is the code....can someone please edit it so I can see an example of how it should be done? Again total PHP newbie so please be clear if possible. Thanks so much!!!

Code: [Select]
<?
/**
 * Object for getting, parsing, and prepping external related content
 *
 * @author Husani S. Oakley
 * @version 1.0
 */
class SMIRC{

  var $total_results;
  var $page_title;
  var $default_header_text = "Blog discussions:";
  var $search_urls = array(
   "google_blogsearch_norss" => "http://blogsearch.google.com/blogsearch?client=news&um=1&hl=en&scoring=d&q=SEARCHTERM&ie=utf-8",
   "google_blogsearch" => "http://blogsearch.google.com/blogsearch_feeds?client=news&um=1&hl=en&scoring=d&q=SEARCHTERM&ie=utf-8&num=NUMRESULTS&output=rss",
   "twitter_search" => "http://search.twitter.com/search.atom?q=SEARCHTERM&rpp=NUMRESULTS"
   );

  /**
   * constructor
   */
  function SMIRC($page_title, $title_separators, $required_keyword, $data_sources, $header_text, $animation=false){
    $this->page_title = $page_title;
    $this->title_separators = $title_separators;
    $this->required_keyword = $required_keyword;
    $this->data_sources = $data_sources;
    if($header_text == ""){
      $this->header_text = $this->default_header_text;
    } else {
      $this->header_text = $header_text;
    }
    $this->animation = $animation;
  }

  /**
   * main work method.  create url, get data, parse, prep and return xhtml
   */
  function getContent(){
    //don't bother doing anything if we don't have any data sources
    if(!is_array($this->data_sources)){ return false; }
    //if we have delimiter characters, use them to split up the title
    $searchterm = $this->_getSearchTerm();
    //start assembling data
    foreach($this->data_sources as $source_array){
      //prep url
      $data_source = str_replace("SEARCHTERM", $searchterm, $this->search_urls[$source_array[0]]);
      $data_source = str_replace("NUMRESULTS", $source_array[1], $data_source);
      //get data, put into array
      $rss_data_array[$source_array[0]]['results'] = $this->_getResults($data_source, split("\n", $source_array[2]));
      $rss_data_array[$source_array[0]]['header'] = $source_array[3];
    }

    //create and return xhtml for all sources
    $xhtml = $this->_createXHTML($rss_data_array, $this->header_text);
    return $xhtml;
  }

  /**
   * create and return all xhtml
   */
  function _createXHTML($rss_array, $header_text){
    foreach($rss_array as $data_source => $results_and_header){
      //run function to get xhtml from rss object -- name of function depends on data source.
      $lists_xhtml .= $this->$data_source($results_and_header['results'], $results_and_header['header']);
    }
    if($lists_xhtml == ""){
      //no results = no xhtml
      return false;
    } else {
      $all_xhtml = '<div class="smirc_wrapper">';
      $all_xhtml .= '<h2 class="collapsed">'.$this->_getHeaderXHTML().'</h2>'; 
      $all_xhtml .= '<ul class="smirc_ul">';

      //add results to overall xhtml
      $all_xhtml .= $lists_xhtml;

      $all_xhtml .= "</ul>"; 
      $all_xhtml .= '</div>';
      return $all_xhtml;
    }

  }

  /**
   * GOOGLE BLOGSEARCH:  iterate through rss object and create standards-compliant xhtml for the resultset, while ignoring items in exclude list
   */
  function google_blogsearch($rss_items, $result_header){
    $list_xhtml = "";
    if(count($rss_items) >= 1){
      $list_xhtml = "";
      foreach($rss_items as $item){
$fixed_item = $this->_parseItem($item);
$list_xhtml .= '<div class="summary">'.strip_tags($fixed_item['summary']).'</div></li>';
      }
    }
    return $list_xhtml;
  }

  /**
   * TWITTER SEARCH:  iterate through rss object and create standards-compliant xhtml for the resultset
   * search.twitter.com doesn't seem to have results limits, so we'll have to do that manually.
   */
  function twitter_search($rss_items, $result_header){
    $list_xhtml = "";
    if(count($rss_items) >= 1){
      $list_xhtml = "";
      foreach($rss_items as $item){
$fixed_item = $this->_parseItem($item);
$list_xhtml .= '<li>'.$fixed_item['atom_content'].' by <a href="'.$fixed_item['author_uri'].'" rel="nofollow" target="_blank">'.$fixed_item['author_name'].'</a></li>';
      }
    }
    return $list_xhtml;
  }

  /**
   * use title separators (if any) to prepare search term(s)
   */
  function _getSearchTerm(){
    if(is_array($this->title_separators)){
      //make this easy -- replace all matches to items in separators array with a common character
      $title = $this->page_title;
      foreach($this->title_separators as $delimiter){
$title = str_replace($delimiter, "###", $title);
      }
      //split by this common character
      $arr = split("###", $title);
      //iterate, trim, add to array
      foreach($arr as $phrase){
$searchterms[] = trim($phrase);
      }
      $searchterms[] = $this->required_keyword;
    } else {
      //no separators.  search terms are title and required keyword if any
      $searchterms[] = $this->page_title;
      $searchterms[] = $this->required_keyword;
    }
    //iterate through searchterms and add quotation marks / urlencode as needed
    $str = a;
    foreach($searchterms as $term){
      $str .= '' . urlencode($term) . '';
    }
    return $str;
  }

  /**
   * using the exclude list (if set) and MagpieRSS, return an array of data sources and results
   */
  function _getResults($data_source, $exclude_list){
    $rss = fetch_rss($data_source);
    //set total results
    $this->_setTotalResults($rss);
    $results = $rss->items;   
    //is there an exclude list?
    if(is_array($exclude_list)){     
      //yes.  iterate and remove
      foreach($exclude_list as $exclude_me){
$matches = $this->array_search_recursive($exclude_me, $results);
unset($results[$matches[0]]);
      }     
    }
    return $results;
  }

  /**
   * unfortunately-ghetto way to remove google's BOLDING of matching wordds
   */
  function _parseItem($arr){
    $newarr;
    if(!is_array($arr)){ return $arr; }
      foreach($arr as $key => $value){
$newval = str_replace("<b>", "", $value);
$newval = str_replace("</b>", "", $newval);
$newarr[$key] = $newval;
      }
      return $newarr;
  }

  /**
   * recursively search a multidimensional array
   */
  function array_search_recursive($needle, $haystack, $path=array()){
    foreach($haystack as $id => $val){
      $path2 = $path;
      $path2[] = $id;       
      if(eregi($needle, $val)){
return $path2;
      } else if(is_array($val)){
if($ret = $this->array_search_recursive($needle, $val, $path2)){
  return $ret;
}
      }
      return false;
    }
  }

  /**
   * add to total results count
   */
  function _setTotalResults($rss){
    if($rss->channel['opensearch']['totalresults']){
      $this->total_results = $this->total_results + $rss->channel['opensearch']['totalresults'];
    }
  }

  /**
   * create header text / link
   */
  function _getHeaderXHTML(){
    //create link
    $link = str_replace("SEARCHTERM", $this->_getSearchTerm(), $this->search_urls['google_blogsearch_norss']);   
    return " ";
  }

}


?>

I have the following code:
if ( !empty($_GET['quantity']) ) {
foreach ( $_GET['quantity'] as $order_code => $quantity ) { // line 13
$Cart->setItemQuantity($order_code, $quantity);
}
}

and I'm getting the following error:
Quote

Warning: Invalid argument supplied for foreach() in shopping-cart/cart_action.php on line 13


$_GET['quantity']; has a value of '1'

The code is working perfectly fine on localhost, but throws me that warning on my webserver(both have error reporting set to E_ALL)

any help is greatly appreciated.

Thanks.

I keep getting the following error.
Warning: Invalid argument supplied for foreach() in /home/content/46/8529846/html/wp-content/themes/super-light/functions.php on line 94

Warning: Cannot modify header information - headers already sent by (output started at /home/content/46/8529846/html/wp-content/themes/super-light/functions.php:94) in /home/content/46/8529846/html/wp-includes/pluggable.php on line 866

Code: [Select]
<?php
if ( ! isset( $content_width ) )
$content_width = 650;

add_action( 'widgets_init', 'super_light_sidebars' );

function super_light_sidebars() {
register_sidebar(array(
    'name' => __( 'Sidebar Widget Area', 'super_light'),
    'id' => 'sidebar-widget-area',
    'description' => __( 'The sidebar widget area', 'super_light'),
    'before_widget' => '<div class="widget">',
    'after_widget' => '</div>',
    'before_title' => '<h3>',
    'after_title' => '</h3>',
));
}

register_nav_menus(
    array(
      'primary' => __('Header Menu', 'super_light'),
      'secondary' => __('Footer Menu', 'super_light')
    )
);

//Multi-level pages menu
function super_light_page_menu() {

if (is_page()) { $highlight = "page_item"; } else {$highlight = "menu-item current-menu-item"; }
echo '<ul class="menu">';
wp_list_pages('sort_column=menu_order&title_li=&link_before=&link_after=&depth=3');
echo '</ul>';
}

//Single-level pages menu
function super_light_menu_flat() {
    if (is_page()) { $highlight = "page_item"; } else {$highlight = "menu-item current-menu-item"; }
    echo '<ul class="menu">';
    wp_list_pages('sort_column=menu_order&title_li=&link_before=&link_after=&depth=1');
    echo '</ul>';
}




add_editor_style();
add_theme_support('automatic-feed-links');
add_theme_support('post-thumbnails');

set_post_thumbnail_size( 120, 120, true ); // Default size

// Make theme available for translation
// Translations can be filed in the /languages/ directory
load_theme_textdomain('super_light', get_template_directory() . '/languages');

function catch_that_image() {
  global $post, $posts;
  $first_img = '';
  ob_start();
  ob_end_clean();
  $output = preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i', $post->post_content, $matches);
  $first_img = $matches [1] [0];

  if(empty($first_img)){ //Defines a default image
    $first_img = "/images/default.jpg";
  }
  return $first_img;
}

add_action('save_post','custom_field_add_tags');

function custom_field_add_tags($post_id) {

 $post = get_post($post_id);

 //get values of custom fields and put into array

 $tag1 = get_post_meta($post_id, 'tag_name1', true);
 $tag2 = get_post_meta($post_id, 'tag_name2', true);
 $tag3 = get_post_meta($post_id, 'tag_name3', true);
 $tag4 = get_post_meta($post_id, 'tag_name4', true);
 $tag5 = get_post_meta($post_id, 'tag_name5', true);
 $tag6 = get_post_meta($post_id, 'tag_name6', true);
 $tag7 = get_post_meta($post_id, 'tag_name7', true);
 $tag8 = get_post_meta($post_id, 'tag_name8', true);
 $tag9 = get_post_meta($post_id, 'tag_name9', true);

 $tags_to_add = array($tag1, $tag2, $tag3, $tag4, $tag5, $tag6, $tag7, $tag8, $tag9);

 //now check if tag does not already exist (if no - add tag from custom field)

 $add_tags = array();

 foreach(get_the_terms($post_id, 'post_tag') as $term)

    if(!in_array($term->slug, $tags_to_add))
        $add_tags[] = $term->slug;

 if(!empty($add_tags))
    wp_add_post_tags($post_id, implode(',', $add_tags));
}

?>

Hi , can somebody help me with this warning? Warning: Invalid argument supplied for foreach() in /home/wwwdesig/public_html/mailer.php on line 12 It´s just a simple php mailer Here is the php code:       <?php if(isset($_POST['submit'])) {