PHP Table Generator

<?php
 
/*
 * @class: Table
 * @author: Michael Scribellito
 * @date: 6-1-11
 */
 
class Table {
 
    private $tmpl = array(
        'table' => '<table>',
        'caption' => '<caption>',
        '/caption' => '</caption>',
        'thead' => '<thead>',
        'thead>tr' => '<tr>',
        'thead>tr>th' => '<th>',
        '/thead>tr>th' => '</th>',
        '/thead>tr' => '</tr>',
        '/thead' => '</thead>',
        'tbody' => '<tbody>',
        'tbody>tr' => '<tr>',
        'tbody>tr>td' => '<td>',
        '/tbody>tr>td' => '</td>',
        '/tbody>tr' => '</tr>',
        'tbody.alt>tr' => '<tr class="alt">',
        'tbody.alt>tr>td' => '<td>',
        '/tbody.alt>tr>td' => '</td>',
        '/tbody.alt>tr' => '</tr>',
        '/tbody' => '</tbody>',
        '/table' => '</table>',
    );
    private $caption = NULL;
    private $headings = array();
    private $rows = array();
    private $empty = '&nbsp;';
    private $function = FALSE;
 
    const NEW_LINE = "\n";
 
    public function __construct() {
 
    }
 
    public function addFilter($function) {
 
        for ($i = 0, $l = count($this->rows); $i < $l; $i++) {
            call_user_func($function, $this->rows[$i], $i, $this);
        }
    }
 
    public function setTemplate($item, $value = '') {
 
        if (!is_array($item)) {
 
            if (isset($this->tmpl[$item])) {
                $this->tmpl[$item] = $value;
            }
        } else {
 
            foreach ($item as $key => $val) {
 
                $this->setTemplate($key, $val);
            }
        }
    }
 
    public function setCaption($caption) {
 
        $this->caption = (string) $caption;
 
        return $this;
    }
 
    public function setColumnHeadings($headings) {
 
        if (is_array($headings)) {
            $this->headings = $headings;
        } else {
            $this->headings = func_get_args();
        }
 
        return $this;
    }
 
    public function setEmpty($empty) {
 
        $this->empty = (string) $empty;
 
        return $this;
    }
 
    public function setFunction($function) {
 
        $this->function = $function;
    }
 
    public function addRow($row) {
 
        if (is_array($row)) {
 
        } else if (is_object($row)) {
            $row = array_values((array) $row);
        } else {
            $row = func_get_args();
        }
        $this->rows[] = $row;
 
        return $this;
    }
 
    public function removeRow($index) {
 
        if (is_int($index)) {
            unset($this->rows[$index]);
        }
    }
 
    public function addData($data) {
 
        if (!is_array($data) || count($data) == 0) {
            return FALSE;
        }
 
        foreach ($data as $row) {
            $this->addRow($row);
        }
    }
 
    private function head() {
 
        $head = '';
 
        if ($this->caption != NULL) {
 
            $head .= $this->tmpl['caption'] . $this->caption;
 
            $head .= $this->tmpl['/caption'] . self::NEW_LINE;
        }
 
        if (count($this->headings) > 0) {
 
            $head .= $this->tmpl['thead'] . self::NEW_LINE;
 
            $head .= $this->tmpl['thead>tr'] . self::NEW_LINE;
 
            foreach ($this->headings as $heading) {
 
                $head .= $this->tmpl['thead>tr>th'] . $heading;
 
                $head .= $this->tmpl['/thead>tr>th'] . self::NEW_LINE;
            }
 
            $head .= $this->tmpl['/thead>tr'] . self::NEW_LINE;
 
            $head .= $this->tmpl['/thead'] . self::NEW_LINE;
        }
 
        return $head;
    }
 
    private function body() {
 
        $body = '';
 
        if (count($this->rows) > 0) {
 
            $i = 1;
 
            $body .= $this->tmpl['tbody'] . self::NEW_LINE;
 
            foreach ($this->rows as $row) {
 
                if (!is_array($row)) {
                    break;
                }
 
                $alt = $i++ % 2 ? '' : '.alt';
 
                $body .= $this->tmpl['tbody' . $alt . '>tr'] . self::NEW_LINE;
 
                foreach ($row as $cell) {
 
                    if ($cell == "" || $cell == NULL) {
                        $cell = $this->empty;
                    }
 
                    if ($this->function != FALSE && is_callable($this->function)) {
                        $cell = call_user_func($this->function, $cell);
                    }
 
                    $body .= $this->tmpl['tbody' . $alt . '>tr>td'] . $cell;
 
                    $body .= $this->tmpl['/tbody' . $alt . '>tr>td'] . self::NEW_LINE;
                }
 
                $body .= $this->tmpl['/tbody' . $alt . '>tr'] . self::NEW_LINE;
            }
 
            $body .= $this->tmpl['/tbody'] . self::NEW_LINE;
        }
 
        return $body;
    }
 
    public function generate() {
 
        $table = $this->tmpl['table'] . self::NEW_LINE;
 
        $table .= $this->head();
 
        $table .= $this->body();
 
        $table .= $this->tmpl['/table'] . self::NEW_LINE;
 
        $this->clear();
 
        return $table;
    }
 
    public function clear() {
 
        $this->headings = array();
        $this->rows = array();
 
        return $this;
    }
 
    public function __toString() {
 
        return $this->generate();
    }
 
}