wputop

gistfile1.php

<?php

namespace App\Helper;

trait WpTrait
{


    /**
     * Replaces double line-breaks with paragraph elements.
     *
     * A group of regex replaces used to identify text formatted with newlines and
     * replace double line-breaks with HTML paragraph tags. The remaining line-breaks
     * after conversion become <<br />> tags, unless $br is set to '0' or 'false'.
     *
     * @since 0.71
     *
     * @param string $pee The text which has to be formatted.
     * @param bool   $br  Optional. If set, this will convert all remaining line-breaks
     *                    after paragraphing. Default true.
     * @return string Text which has been converted into correct paragraph tags.
     */
    public function wpautop($pee, $br = true)
    {
        $pre_tags = array();

        if (trim($pee) === '') {
            return '';
        }

        // Just to make things a little easier, pad the end.
        $pee = $pee . "\n";

        /*
         * Pre tags shouldn't be touched by autop.
         * Replace pre tags with placeholders and bring them back after autop.
         */
        if (strpos($pee, '<pre') !== false) {
            $pee_parts = explode('</pre>', $pee);
            $last_pee = array_pop($pee_parts);
            $pee = '';
            $i = 0;

            foreach ($pee_parts as $pee_part) {
                $start = strpos($pee_part, '<pre');

                // Malformed html?
                if ($start === false) {
                    $pee .= $pee_part;
                    continue;
                }

                $name = "<pre wp-pre-tag-$i></pre>";
                $pre_tags[$name] = substr($pee_part, $start) . '</pre>';

                $pee .= substr($pee_part, 0, $start) . $name;
                $i++;
            }

            $pee .= $last_pee;
        }
        // Change multiple <br>s into two line breaks, which will turn into paragraphs.
        $pee = preg_replace('|<br\s*/?>\s*<br\s*/?>|', "\n\n", $pee);

        $allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|form|map|area|blockquote|address|math|style|p|h[1-6]|hr|fieldset|legend|section|article|aside|hgroup|header|footer|nav|figure|figcaption|details|menu|summary)';

        // Add a double line break above block-level opening tags.
        $pee = preg_replace('!(<' . $allblocks . '[\s/>])!', "\n\n$1", $pee);

        // Add a double line break below block-level closing tags.
        $pee = preg_replace('!(</' . $allblocks . '>)!', "$1\n\n", $pee);

        // Standardize newline characters to "\n".
        $pee = str_replace(array("\r\n", "\r"), "\n", $pee);

        // Find newlines in all elements and add placeholders.
        $pee = $this->wp_replace_in_html_tags($pee, array("\n" => ' <!-- wpnl --> '));

        // Collapse line breaks before and after <option> elements so they don't get autop'd.
        if (strpos($pee, '<option') !== false) {
            $pee = preg_replace('|\s*<option|', '<option', $pee);
            $pee = preg_replace('|</option>\s*|', '</option>', $pee);
        }

        /*
         * Collapse line breaks inside <object> elements, before <param> and <embed> elements
         * so they don't get autop'd.
         */
        if (strpos($pee, '</object>') !== false) {
            $pee = preg_replace('|(<object[^>]*>)\s*|', '$1', $pee);
            $pee = preg_replace('|\s*</object>|', '</object>', $pee);
            $pee = preg_replace('%\s*(</?(?:param|embed)[^>]*>)\s*%', '$1', $pee);
        }

        /*
         * Collapse line breaks inside <audio> and <video> elements,
         * before and after <source> and <track> elements.
         */
        if (strpos($pee, '<source') !== false || strpos($pee, '<track') !== false) {
            $pee = preg_replace('%([<\[](?:audio|video)[^>\]]*[>\]])\s*%', '$1', $pee);
            $pee = preg_replace('%\s*([<\[]/(?:audio|video)[>\]])%', '$1', $pee);
            $pee = preg_replace('%\s*(<(?:source|track)[^>]*>)\s*%', '$1', $pee);
        }

        // Collapse line breaks before and after <figcaption> elements.
        if (strpos($pee, '<figcaption') !== false) {
            $pee = preg_replace('|\s*(<figcaption[^>]*>)|', '$1', $pee);
            $pee = preg_replace('|</figcaption>\s*|', '</figcaption>', $pee);
        }

        // Remove more than two contiguous line breaks.
        $pee = preg_replace("/\n\n+/", "\n\n", $pee);

        // Split up the contents into an array of strings, separated by double line breaks.
        $pees = preg_split('/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY);

        // Reset $pee prior to rebuilding.
        $pee = '';

        // Rebuild the content as a string, wrapping every bit with a <p>.
        foreach ($pees as $tinkle) {
            $pee .= '<p>' . trim($tinkle, "\n") . "</p>\n";
        }

        // Under certain strange conditions it could create a P of entirely whitespace.
        $pee = preg_replace('|<p>\s*</p>|', '', $pee);

        // Add a closing <p> inside <div>, <address>, or <form> tag if missing.
        $pee = preg_replace('!<p>([^<]+)</(div|address|form)>!', '<p>$1</p></$2>', $pee);

        // If an opening or closing block element tag is wrapped in a <p>, unwrap it.
        $pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)\s*</p>!', '$1', $pee);

        // In some cases <li> may get wrapped in <p>, fix them.
        $pee = preg_replace('|<p>(<li.+?)</p>|', '$1', $pee);

        // If a <blockquote> is wrapped with a <p>, move it inside the <blockquote>.
        $pee = preg_replace('|<p><blockquote([^>]*)>|i', '<blockquote$1><p>', $pee);
        $pee = str_replace('</blockquote></p>', '</p></blockquote>', $pee);

        // If an opening or closing block element tag is preceded by an opening <p> tag, remove it.
        $pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)!', '$1', $pee);

        // If an opening or closing block element tag is followed by a closing <p> tag, remove it.
        $pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*</p>!', '$1', $pee);

        // Optionally insert line breaks.
        if ($br) {
            // Replace newlines that shouldn't be touched with a placeholder.
            $pee = preg_replace_callback('/<(script|style).*?<\/\\1>/s', [$this, '_autop_newline_preservation_helper'], $pee);

            // Normalize <br>
            $pee = str_replace(array('<br>', '<br/>'), '<br />', $pee);

            // Replace any new line characters that aren't preceded by a <br /> with a <br />.
            $pee = preg_replace('|(?<!<br />)\s*\n|', "<br />\n", $pee);

            // Replace newline placeholders with newlines.
            $pee = str_replace('<WPPreserveNewline />', "\n", $pee);
        }

        // If a <br /> tag is after an opening or closing block tag, remove it.
        $pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*<br />!', '$1', $pee);

        // If a <br /> tag is before a subset of opening or closing block tags, remove it.
        $pee = preg_replace('!<br />(\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee);
        $pee = preg_replace("|\n</p>$|", '</p>', $pee);

        // Replace placeholder <pre> tags with their original content.
        if (!empty($pre_tags)) {
            $pee = str_replace(array_keys($pre_tags), array_values($pre_tags), $pee);
        }

        // Restore newlines in all elements.
        if (false !== strpos($pee, '<!-- wpnl -->')) {
            $pee = str_replace(array(' <!-- wpnl --> ', '<!-- wpnl -->'), "\n", $pee);
        }

        return $pee;
    }

/**
 * Replace characters or phrases within HTML elements only.
 *
 * @since 4.2.3
 *
 * @param string $haystack The text which has to be formatted.
 * @param array $replace_pairs In the form array('from' => 'to', ...).
 * @return string The formatted text.
 */
    private function wp_replace_in_html_tags($haystack, $replace_pairs)
    {
        // Find all elements.
        $textarr = $this->wp_html_split($haystack);
        $changed = false;

        // Optimize when searching for one item.
        if (1 === count($replace_pairs)) {
            // Extract $needle and $replace.
            foreach ($replace_pairs as $needle => $replace) {
            }

            // Loop through delimiters (elements) only.
            for ($i = 1, $c = count($textarr); $i < $c; $i += 2) {
                if (false !== strpos($textarr[$i], $needle)) {
                    $textarr[$i] = str_replace($needle, $replace, $textarr[$i]);
                    $changed = true;
                }
            }
        } else {
            // Extract all $needles.
            $needles = array_keys($replace_pairs);

            // Loop through delimiters (elements) only.
            for ($i = 1, $c = count($textarr); $i < $c; $i += 2) {
                foreach ($needles as $needle) {
                    if (false !== strpos($textarr[$i], $needle)) {
                        $textarr[$i] = strtr($textarr[$i], $replace_pairs);
                        $changed = true;
                        // After one strtr() break out of the foreach loop and look at next element.
                        break;
                    }
                }
            }
        }

        if ($changed) {
            $haystack = implode($textarr);
        }

        return $haystack;
    }

/**
 * Separate HTML elements and comments from the text.
 *
 * @since 4.2.4
 *
 * @param string $input The text which has to be formatted.
 * @return array The formatted text.
 */
    private function wp_html_split($input)
    {
        return preg_split($this->get_html_split_regex(), $input, -1, PREG_SPLIT_DELIM_CAPTURE);
    }

/**
 * Retrieve the regular expression for an HTML element.
 *
 * @since 4.4.0
 *
 * @staticvar string $regex
 *
 * @return string The regular expression
 */
    private function get_html_split_regex()
    {
        static $regex;

        if (!isset($regex)) {
            // phpcs:disable Squiz.Strings.ConcatenationSpacing.PaddingFound -- don't remove regex indentation
            $comments =
            '!' // Start of comment, after the <.
             . '(?:' // Unroll the loop: Consume everything until --> is found.
             . '-(?!->)' // Dash not followed by end of comment.
             . '[^\-]*+' // Consume non-dashes.
             . ')*+' // Loop possessively.
             . '(?:-->)?'; // End of comment. If not found, match all input.

            $cdata =
            '!\[CDATA\[' // Start of comment, after the <.
             . '[^\]]*+' // Consume non-].
             . '(?:' // Unroll the loop: Consume everything until ]]> is found.
             . '](?!]>)' // One ] not followed by end of comment.
             . '[^\]]*+' // Consume non-].
             . ')*+' // Loop possessively.
             . '(?:]]>)?'; // End of comment. If not found, match all input.

            $escaped =
            '(?=' // Is the element escaped?
             . '!--'
            . '|'
            . '!\[CDATA\['
            . ')'
            . '(?(?=!-)' // If yes, which type?
             . $comments
                . '|'
                . $cdata
                . ')';

            $regex =
            '/(' // Capture the entire match.
             . '<' // Find start of element.
             . '(?' // Conditional expression follows.
             . $escaped // Find end of escaped element.
             . '|' // ... else ...
             . '[^>]*>?' // Find end of normal element.
             . ')'
                . ')/';
            // phpcs:enable
        }

        return $regex;
    }

}