HTMLPurifier_AttrTransform_ImgRequired Class Reference

Transform that supplies default values for the src and alt attributes in img tags, as well as prevents the img tag from being removed because of a missing alt tag. More...

Inheritance diagram for HTMLPurifier_AttrTransform_ImgRequired:

Collaboration diagram for HTMLPurifier_AttrTransform_ImgRequired:

Public Member Functions
	transform ($attr, $config, $context)
	Abstract: makes changes to the attributes dependent on multiple values.
Public Member Functions inherited from HTMLPurifier_AttrTransform
	prependCSS (&$attr, $css)
	Prepends CSS properties to the style attribute, creating the attribute if it doesn't exist.
	confiscateAttr (&$attr, $key)
	Retrieves and removes an attribute.

Detailed Description

Transform that supplies default values for the src and alt attributes in img tags, as well as prevents the img tag from being removed because of a missing alt tag.

This needs to be registered as both a pre and post attribute transform.

Definition at line 11 of file ImgRequired.php.

Member Function Documentation

HTMLPurifier_AttrTransform_ImgRequired::transform	(		$attr,
			$config,
			$context
	)

Abstract: makes changes to the attributes dependent on multiple values.

Parameters

$attr	Assoc array of attributes, usually from HTMLPurifier_Token_Tag::$attr
$config	Mandatory HTMLPurifier_Config object.
$context	Mandatory HTMLPurifier_Context object

Returns

Processed attribute array.

Reimplemented from HTMLPurifier_AttrTransform.

Definition at line 14 of file ImgRequired.php.

                                                        {

        $src = true;
        if (!isset($attr['src'])) {
            if ($config->get('Core.RemoveInvalidImg')) return $attr;
            $attr['src'] = $config->get('Attr.DefaultInvalidImage');
            $src = false;
        }

        if (!isset($attr['alt'])) {
            if ($src) {
                $alt = $config->get('Attr.DefaultImageAlt');
                if ($alt === null) {
                    // truncate if the alt is too long
                    $attr['alt'] = substr(basename($attr['src']),0,40);
                } else {
                    $attr['alt'] = $alt;
                }
            } else {
                $attr['alt'] = $config->get('Attr.DefaultInvalidImageAlt');
            }
        }

        return $attr;

    }

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The documentation for this class was generated from the following file:

• Services/Html/HtmlPurifier/library/HTMLPurifier/AttrTransform/ImgRequired.php