Phase 5: Content and SEO - Yoast SEO, Schema.org markup, Open Graph, favicon support, XML sitemap

wp-content/plugins/wordpress-seo/src/helpers/string-helper.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace Yoast\WP\SEO\Helpers;
+
+/**
+ * A helper object for string operations.
+ */
+class String_Helper {
+
+	/**
+	 * Strips all HTML tags including script and style.
+	 *
+	 * @param string $text The text to strip the tags from.
+	 *
+	 * @return string The processed string.
+	 */
+	public function strip_all_tags( $text ) {
+		return \wp_strip_all_tags( $text );
+	}
+
+	/**
+	 * Standardize whitespace in a string.
+	 *
+	 * Replace line breaks, carriage returns, tabs with a space, then remove double spaces.
+	 *
+	 * @param string $text Text input to standardize.
+	 *
+	 * @return string
+	 */
+	public function standardize_whitespace( $text ) {
+		return \trim( \str_replace( '  ', ' ', \str_replace( [ "\t", "\n", "\r", "\f" ], ' ', $text ) ) );
+	}
+
+	/**
+	 * First strip out registered and enclosing shortcodes using native WordPress strip_shortcodes function.
+	 * Then strip out the shortcodes with a filthy regex, because people don't properly register their shortcodes.
+	 *
+	 * @param string $text Input string that might contain shortcodes.
+	 *
+	 * @return string String without shortcodes.
+	 */
+	public function strip_shortcode( $text ) {
+		return \preg_replace( '`\[[^\]]+\]`s', '', \strip_shortcodes( $text ) );
+	}
+}