sizeof - PHP code example

The PHP Function Sizeof

An array is a data structure that stores information in a certain order. An array can hold a variety of data types such as integers, strings, and objects. When dealing with an array, you will often want to know its length in order to perform various operations on it. This is where the php function sizeof comes in.

sizeof() is a built-in function in PHP that is an alias of the count() function. Both functions work similarly and have the same purpose. Count() is used to count all of the elements or properties in an array or other countable object, including multidimensional arrays.

The sizeof() function works by taking in two parameters: the array that you wish to count, and an optional mode that determines how the function will behave. The mode can be either COUNT_NORMAL, which is the default, or COUNT_RECURSIVE. If you use the COUNT_RECURSIVE mode, then the function will recursively count all of the elements in the array and any sub-arrays that are contained within it.

Despite being an alias of count(), sizeof() takes significantly longer to execute than count(). For this reason, I recommend that you always use count() to count the number of items in your arrays, unless there is a compelling reason to do otherwise. Also, if you have the ability to, try to avoid using sizeof() in loops, as it will cause your code to run slower and consume more resources. Instead, prefer the powerful forEach() function to iterate over arrays if possible.

sizeof example

    public static function merge_items($urls, $start = 0, $end = 0, $limit = 0)
    {
        if (is_array($urls) && sizeof($urls) > 0)
        {
            $items = array();
            foreach ($urls as $arg)
            {
                if ($arg instanceof SimplePie)
                {
                    $items = array_merge($items, $arg->get_items(0, $limit));
                }
                else
                {
                    trigger_error('Arguments must be SimplePie objects', E_USER_WARNING);
                }

// ----- Create a list from the string       $v_string_list = explode(PCLZIP_SEPARATOR, $p_filelist);
    }

    // ----- Invalid variable type for $p_filelist     else {
      PclZip::privErrorLog(PCLZIP_ERR_INVALID_PARAMETER, "Invalid variable type p_filelist");
      return 0;
    }

    // ----- Reformat the string list     if (sizeof($v_string_list) != 0) {
      foreach ($v_string_list as $v_string) {
        if ($v_string != '') {
          $v_att_list[][PCLZIP_ATT_FILE_NAME] = $v_string;
        }
        else {
        }
      }
    }

    // ----- For each file in the list check the attributes     $v_supported_attributes
    =

  public function __construct($from_lines, $to_lines, $mapped_from_lines, $mapped_to_lines) {

    assert(sizeof($from_lines) == sizeof($mapped_from_lines));
    assert(sizeof($to_lines) == sizeof($mapped_to_lines));

    parent::__construct($mapped_from_lines, $mapped_to_lines);

    $xi = $yi = 0;
    for ($i = 0; $i < sizeof($this->edits); $i++) {
      $orig = &$this->edits[$i]->orig;
      if (is_array($orig)) {
        $orig = array_slice($from_lines, $xi, sizeof($orig));
        $xi += sizeof($orig);
      }

  public function lcs() {
    @trigger_error(__METHOD__ . '() is deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. There is no replacement. See https://www.drupal.org/node/3337942', E_USER_DEPRECATED);
    $lcs = 0;
    foreach ($this->edits as $edit) {
      if ($edit->type == 'copy') {
        $lcs += sizeof($edit->orig);
      }
    }
    return $lcs;
  }

  /** * Gets the original set of lines. * * This reconstructs the $from_lines parameter passed to the * constructor. * * @return array The original sequence of strings. * * @deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. There is no * replacement. * * @see https://www.drupal.org/node/3337942 */

        $stack[] = array($mode, $options);
        return true;
    }

    public static function staticPopErrorHandling()
    {
        $stack = &$GLOBALS['_PEAR_error_handler_stack'];
        $setmode     = &$GLOBALS['_PEAR_default_error_mode'];
        $setoptions  = &$GLOBALS['_PEAR_default_error_options'];
        array_pop($stack);
        list($mode, $options) = $stack[sizeof($stack) - 1];
        array_pop($stack);
        switch ($mode) {
            case PEAR_ERROR_EXCEPTION:
            case PEAR_ERROR_RETURN:
            case PEAR_ERROR_PRINT:
            case PEAR_ERROR_TRIGGER:
            case PEAR_ERROR_DIE:
            case null:
                $setmode = $mode;
                $setoptions = $options;
                break;

                // treat as a JSON object                 if (is_array($var) && count($var) && (array_keys($var) !== range(0, sizeof($var) - 1))) {
                    $properties = array_map(array($this, 'name_value'),
                                            array_keys($var),
                                            array_values($var));

                    foreach($properties as $property) {
                        if(Services_JSON::isError($property)) {
                            return $property;
                        }
                    }

                    return '{' . join(',', $properties) . '}';
                }

$v_header = array();

        // ----- Remove potential windows directory separator         $p_add_dir = $this->_translateWinPath($p_add_dir);
        $p_remove_dir = $this->_translateWinPath($p_remove_dir, false);

        if (!$this->_file) {
            $this->_error('Invalid file descriptor');
            return false;
        }

        if (sizeof($p_list) == 0) {
            return true;
        }

        foreach ($p_list as $v_filename) {
            if (!$v_result) {
                break;
            }

            // ----- Skip the current tar name             if ($v_filename == $this->_tarname) {
                continue;
            }

$block = FALSE;
    $context = [];

    $nlead = $this->leading_context_lines;
    $ntrail = $this->trailing_context_lines;

    $this->_start_diff();

    foreach ($diff->getEdits() as $edit) {
      if ($edit->type == 'copy') {
        if (is_array($block)) {
          if (sizeof($edit->orig) <= $nlead + $ntrail) {
            $block[] = $edit;
          }
          else {
            if ($ntrail) {
              $context = array_slice($edit->orig, 0, $ntrail);
              $block[] = new DiffOpCopy($context);
            }
            $this->_block($x0, $ntrail + $xi - $x0, $y0, $ntrail + $yi - $y0, $block);
            $block = FALSE;
          }
        }

const USE_ASSERTS = FALSE;

  const MAX_XREF_LENGTH = 10000;

  public function __construct() {
    @trigger_error('Drupal\Component\Diff\Engine\DiffEngine is deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. Use sebastianbergmann/diff instead. See https://www.drupal.org/node/3337942', E_USER_DEPRECATED);
  }

  public function diff($from_lines, $to_lines) {

    $n_from = sizeof($from_lines);
    $n_to = sizeof($to_lines);

    $this->xchanged = $this->ychanged = [];
    $this->xv = $this->yv = [];
    $this->xind = $this->yind = [];
    unset($this->seq);
    unset($this->in_seq);
    unset($this->lcs);

    // Skip leading common lines.     for ($skip = 0; $skip < $n_from && $skip < $n_to; $skip++) {

            // DURATION             if ($duration_parent = $this->get_item_tags(SIMPLEPIE_NAMESPACE_ITUNES, 'duration'))
            {
                $seconds = null;
                $minutes = null;
                $hours = null;
                if (isset($duration_parent[0]['data']))
                {
                    $temp = explode(':', $this->sanitize($duration_parent[0]['data'], SIMPLEPIE_CONSTRUCT_TEXT));
                    if (sizeof($temp) > 0)
                    {
                        $seconds = (int) array_pop($temp);
                    }
                    if (sizeof($temp) > 0)
                    {
                        $minutes = (int) array_pop($temp);
                        $seconds += $minutes * 60;
                    }
                    if (sizeof($temp) > 0)
                    {
                        $hours = (int) array_pop($temp);

trigger_error('pure virtual', E_USER_ERROR);
  }

  /** * @deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. There is no * replacement. * * @see https://www.drupal.org/node/3337942 */
  public function norig() {
    @trigger_error(__METHOD__ . '() is deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. There is no replacement. See https://www.drupal.org/node/3337942', E_USER_DEPRECATED);
    return $this->orig ? sizeof($this->orig) : 0;
  }

  /** * @deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. There is no * replacement. * * @see https://www.drupal.org/node/3337942 */
  public function nclosing() {
    @trigger_error(__METHOD__ . '() is deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. There is no replacement. See https://www.drupal.org/node/3337942', E_USER_DEPRECATED);
    return $this->closing ? sizeof($this->closing) : 0;
  }