/**
* Opens the Tag.
*
* @return string|null
*/
public function open()
{
$this->isOpened = true;
// If self closing, put value as attribute
foreach ($this->injectProperties() as $attribute => $property) {
if (!$this->isSelfClosing && $attribute == 'value') {
continue;
}
if (is_null($property) && !is_empty($property)) {
continue;
}
$this->attributes[$attribute] = $property;
}
// Invisible tags
if (!$this->element) {
return;
}
return '<' . $this->element . Helpers::parseAttributes($this->attributes) . $this->getTagCloser();
}
public function testCanIgnoreNullAttributesWhenNecessary()
{
$attributes = array('min' => 0, 'max' => 0, 'value' => 0, 'required' => 0);
$attributes = Helpers::parseAttributes($attributes);
$this->assertEquals(' min="0" max="0" value="0"', $attributes);
}