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<?php

function wpcf7_autop( $pee, $br = 1 ) {

if ( trim( $pee ) === '' )
		return '';
	$pee = $pee . "\n"; // just to make things a little easier, pad the end
	$pee = preg_replace( '| \s* |', "\n\n", $pee );
	// Space things out a little
	/* wpcf7: remove select and input */
	$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)';
	$pee = preg_replace( '!(<' . $allblocks . '[^>]*>)!', "\n$1", $pee );
	$pee = preg_replace( '!(</' . $allblocks . '>)!', "$1\n\n", $pee );
	$pee = str_replace( array( "\r\n", "\r" ), "\n", $pee ); // cross-platform newlines
	if ( strpos( $pee, '<object' ) !== false ) {
		$pee = preg_replace( '|\s*<param([^>]*)>\s*|', "<param$1>", $pee ); // no pee inside object/embed
		$pee = preg_replace( '|\s*</embed>\s*|', '</embed>', $pee );
	}
	$pee = preg_replace( "/\n\n+/", "\n\n", $pee ); // take care of duplicates
	// make paragraphs, including one at the end
	$pees = preg_split( '/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY );
	$pee = '';
	foreach ( $pees as $tinkle )
		$pee .= '' . trim( $tinkle, "\n" ) . "\n";
	$pee = preg_replace( '|\s*|', '', $pee ); // under certain strange conditions it could create a P of entirely whitespace
	$pee = preg_replace( '!([^<]+)</(div|address|form|fieldset)>!', "$1</$2>", $pee );
	$pee = preg_replace( '!\s*(</?' . $allblocks . '[^>]*>)\s*!', "$1", $pee ); // don't pee all over a tag
	$pee = preg_replace( "|(<li.+?)|", "$1", $pee ); // problem with nested lists
	$pee = preg_replace( '|<blockquote([^>]*)>|i', "<blockquote$1>", $pee );
	$pee = str_replace( '</blockquote>', '</blockquote>', $pee );
	$pee = preg_replace( '!\s*(</?' . $allblocks . '[^>]*>)!', "$1", $pee );
	$pee = preg_replace( '!(</?' . $allblocks . '[^>]*>)\s*!', "$1", $pee );
	if ( $br ) {
		/* wpcf7: add textarea */
		$pee = preg_replace_callback( '/<(script|style|textarea).*?<\/\\1>/s', create_function( '$matches', 'return str_replace("\n", "<WPPreserveNewline />", $matches[0]);' ), $pee );
		$pee = preg_replace( '|(?<! )\s*\n|', " \n", $pee ); // optionally make line breaks
		$pee = str_replace( '<WPPreserveNewline />', "\n", $pee );
	}
	$pee = preg_replace( '!(</?' . $allblocks . '[^>]*>)\s* !', "$1", $pee );
	$pee = preg_replace( '! (\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee );
	if ( strpos( $pee, '<pre' ) !== false )
		$pee = preg_replace_callback( '!(<pre[^>]*>)(.*?)</pre>!is', 'clean_pre', $pee );
	$pee = preg_replace( "|\n$|", '', $pee );

return $pee;
}

function wpcf7_strip_quote( $text ) {
	$text = trim( $text );

if ( preg_match( '/^"(.*)"$/', $text, $matches ) )
		$text = $matches[1];
	elseif ( preg_match( "/^'(.*)'$/", $text, $matches ) )
		$text = $matches[1];

return $text;
}

function wpcf7_strip_quote_deep( $arr ) {
	if ( is_string( $arr ) )
		return wpcf7_strip_quote( $arr );

if ( is_array( $arr ) ) {
		$result = array();

foreach ( $arr as $key => $text )
			$result[$key] = wpcf7_strip_quote_deep( $text );

return $result;
	}
}

function wpcf7_normalize_newline( $text, $to = "\n" ) {
	if ( ! is_string( $text ) )
		return $text;

$nls = array( "\r\n", "\r", "\n" );

if ( ! in_array( $to, $nls ) )
		return $text;

return str_replace( $nls, $to, $text );
}

function wpcf7_normalize_newline_deep( $arr, $to = "\n" ) {
	if ( is_array( $arr ) ) {
		$result = array();

foreach ( $arr as $key => $text )
			$result[$key] = wpcf7_normalize_newline_deep( $text, $to );

return $result;
	}

return wpcf7_normalize_newline( $arr, $to );
}

function wpcf7_canonicalize( $text ) {
	if ( function_exists( 'mb_convert_kana' ) && 'UTF-8' == get_option( 'blog_charset' ) )
		$text = mb_convert_kana( $text, 'asKV', 'UTF-8' );

$text = strtolower( $text );
	$text = trim( $text );
	return $text;
}

function wpcf7_is_name( $string ) {
	// See http://www.w3.org/TR/html401/types.html#h-6.2
	// ID and NAME tokens must begin with a letter ([A-Za-z])
	// and may be followed by any number of letters, digits ([0-9]),
	// hyphens ("-"), underscores ("_"), colons (":"), and periods (".").

return preg_match( '/^[A-Za-z][-A-Za-z0-9_:.]*$/', $string );
}

function wpcf7_sanitize_unit_tag( $tag ) {
	$tag = preg_replace( '/[^A-Za-z0-9_-]/', '', $tag );
	return $tag;
}

function wpcf7_is_email( $email ) {
	$result = is_email( $email );
	return apply_filters( 'wpcf7_is_email', $result, $email );
}

function wpcf7_is_url( $url ) {
	$result = ( false !== filter_var( $url, FILTER_VALIDATE_URL ) );
	return apply_filters( 'wpcf7_is_url', $result, $url );
}

function wpcf7_is_tel( $tel ) {
	$result = preg_match( '/^[+]?[0-9() -]*$/', $tel );
	return apply_filters( 'wpcf7_is_tel', $result, $tel );
}

function wpcf7_is_number( $number ) {
	$result = is_numeric( $number );
	return apply_filters( 'wpcf7_is_number', $result, $number );
}

function wpcf7_is_date( $date ) {
	$result = preg_match( '/^([0-9]{4,})-([0-9]{2})-([0-9]{2})$/', $date, $matches );

if ( $result )
		$result = checkdate( $matches[2], $matches[3], $matches[1] );

return apply_filters( 'wpcf7_is_date', $result, $date );
}