80 lines
1.8 KiB
PHP
80 lines
1.8 KiB
PHP
<?php
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/**
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* The HTML helpers.
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*
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* @since 1.0.0
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* @package RankMath
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* @subpackage RankMath\Helpers
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* @author RankMath <support@rankmath.com>
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*/
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namespace RankMath\Helpers;
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/**
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* HTML class.
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*/
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class HTML {
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/**
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* Extract attributes from a html tag.
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*
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* @param string $elem Extract attributes from tag.
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*
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* @return array
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*/
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public static function extract_attributes( $elem ) {
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$regex = '#([^\s=]+)\s*=\s*(\'[^<\']*\'|"[^<"]*")#';
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preg_match_all( $regex, $elem, $attributes, PREG_SET_ORDER );
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$new = [];
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$remaining = $elem;
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foreach ( $attributes as $attribute ) {
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$val = substr( $attribute[2], 1, -1 );
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$new[ $attribute[1] ] = $val;
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$remaining = str_replace( $attribute[0], '', $remaining );
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}
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// Chop off tag name.
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$remaining = preg_replace( '/<[^\s]+/', '', $remaining, 1 );
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// Check for empty attributes without values.
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$regex = '/([^<][\w\d:_-]+)[\s>]/i';
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preg_match_all( $regex, $remaining, $attributes, PREG_SET_ORDER );
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foreach ( $attributes as $attribute ) {
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$new[ trim( $attribute[1] ) ] = null;
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}
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return $new;
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}
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/**
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* Generate html attribute string for array.
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*
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* @param array $attributes Contains key/value pair to generate a string.
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* @param string $prefix If you want to append a prefic before every key.
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*
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* @return string
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*/
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public static function attributes_to_string( $attributes = [], $prefix = '' ) {
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// Early Bail!
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if ( empty( $attributes ) ) {
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return false;
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}
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$out = '';
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foreach ( $attributes as $key => $value ) {
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if ( true === $value || false === $value ) {
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$value = $value ? 'true' : 'false';
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}
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$out .= ' ' . esc_html( $prefix . $key );
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if ( null === $value ) {
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continue;
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}
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$out .= sprintf( '="%s"', esc_attr( $value ) );
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}
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return $out;
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}
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}
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