core-bundle/src/Resources/contao/widgets/TrblField.php
public function generate()
	{
		$arrUnits = array();

		foreach ($this->arrUnits as $arrUnit)
		{
			$arrUnits[] = sprintf('<option value="%s"%s>%s</option>',
								   StringUtil::specialchars($arrUnit['value']),
								   $this->isSelected($arrUnit),
								   $arrUnit['label']);
		}

		$arrFields = array();
		$arrKeys = array('top', 'right', 'bottom', 'left');

		if (!\is_array($this->varValue))
		{
			$this->varValue = array();
		}

		foreach ($arrKeys as $strKey)
		{
			$arrFields[] = sprintf('<input type="text" name="%s[%s]" id="ctrl_%s" class="tl_text_trbl trbl_%s%s" value="%s"%s onfocus="Backend.getScrollOffset()">',
									$this->strName,
									$strKey,
									$this->strId.'_'.$strKey,
									$strKey,
									(($this->strClass != '') ? ' ' . $this->strClass : ''),
									StringUtil::specialchars(@$this->varValue[$strKey]), // see #4979
									$this->getAttributes());
		}

		return sprintf('%s <select name="%s[unit]" class="tl_select_unit" onfocus="Backend.getScrollOffset()"%s>%s</select>%s',
						implode(' ', $arrFields),
						$this->strName,
						$this->getAttribute('disabled'),
						implode('', $arrUnits),
						$this->wizard);
	}
public function generate()
	{
		$arrUnits = array();

		foreach ($this->arrUnits as $arrUnit)
		{
			$arrUnits[] = sprintf('<option value="%s"%s>%s</option>',
								   StringUtil::specialchars($arrUnit['value']),
								   $this->isSelected($arrUnit),
								   $arrUnit['label']);
		}

		$arrFields = array();
		$arrKeys = array('top', 'right', 'bottom', 'left');

		if (!\is_array($this->varValue))
		{
			$this->varValue = array();
		}

		foreach ($arrKeys as $strKey)
		{
			$arrFields[] = sprintf('<input type="text" name="%s[%s]" id="ctrl_%s" class="tl_text_trbl trbl_%s%s" value="%s"%s onfocus="Backend.getScrollOffset()">',
									$this->strName,
									$strKey,
									$this->strId.'_'.$strKey,
									$strKey,
									(($this->strClass != '') ? ' ' . $this->strClass : ''),
									StringUtil::specialchars(@$this->varValue[$strKey]), // see #4979
									$this->getAttributes());
		}

		return sprintf('%s <select name="%s[unit]" class="tl_select_unit" onfocus="Backend.getScrollOffset()"%s>%s</select>%s',
						implode(' ', $arrFields),
						$this->strName,
						$this->getAttribute('disabled'),
						implode('', $arrUnits),
						$this->wizard);
	}
Generate the widget and return it as string

@return string