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/home/tahkoom/public_html/wp-content/plugins/ninja-forms/includes/Helper.php
<?php if ( ! defined( 'ABSPATH' ) ) exit;
/**
* Class WPN_Helper
*
* The WP Ninjas Static Helper Class
*
* Provides additional helper functionality to WordPress helper functions.
*/
class WPN_Helper
{
/**
* @param $value
* @return array|string
*/
public static function addslashes( $value )
{
$value = is_array($value) ?
array_map('WPN_Helper::addslashes' , $value) :
addslashes($value);
return $value;
}
/**
* @param $input
* @return array|string
*/
public static function utf8_encode( $input ){
if ( is_array( $input ) ) {
return array_map( 'WPN_Helper::utf8_encode' , $input );
} elseif ( function_exists( 'utf8_encode' ) ) {
return static::iso8859_1_to_utf8( $input );
} else {
return $input;
}
}
/**
* Replace utf8_encode with mimicked functionaliy
*
* Deprecated in PHP8 and removed in PHP9
*
* Replacement credit: https://php.watch/versions/8.2/utf8_encode-utf8_decode-deprecated
* and https://github.com/symfony/polyfill-php72/blob/v1.26.0/Php72.php#L32-39
*
* @param string $string
* @return string
*/
public static function iso8859_1_to_utf8( $s) {
if(!is_string($s)){
return $s;
}
$s .= $s;
$len = \strlen($s);
for ($i = $len >> 1, $j = 0; $i < $len; ++$i, ++$j) {
switch (true) {
case $s[$i] < "\x80": $s[$j] = $s[$i]; break;
case $s[$i] < "\xC0": $s[$j] = "\xC2"; $s[++$j] = $s[$i]; break;
default: $s[$j] = "\xC3"; $s[++$j] = \chr(\ord($s[$i]) - 64); break;
}
}
return substr($s, 0, $j);
}
/**
* @param $input
* @return array|string
*/
public static function utf8_decode( $input ){
if ( is_array( $input ) ) {
return array_map( 'WPN_Helper::utf8_decode' , $input );
} elseif ( function_exists( 'utf8_decode' ) ) {
return self::utf8_to_iso8859_1( $input );
} else {
return $input;
}
}
/**
* Replace utf8_decode with mimicked functionaliy
*
* Deprecated in PHP8 and removed in PHP9
*
* Replacement credit: https://php.watch/versions/8.2/utf8_encode-utf8_decode-deprecated
* and https://github.com/symfony/polyfill-php72/blob/v1.26.0/Php72.php#L40-69
*
* @param string $string
* @return string
*/
public static function utf8_to_iso8859_1( $string)
{
if(!is_string($string)){
return $string;
}
$s = (string) $string;
$len = \strlen($s);
for ($i = 0, $j = 0; $i < $len; ++$i, ++$j) {
switch ($s[$i] & "\xF0") {
case "\xC0":
case "\xD0":
$c = (\ord($s[$i] & "\x1F") << 6) | \ord($s[++$i] & "\x3F");
$s[$j] = $c < 256 ? \chr($c) : '?';
break;
case "\xF0":
++$i;
// no break
case "\xE0":
$s[$j] = '?';
$i += 2;
break;
default:
$s[$j] = $s[$i];
}
}
return substr($s, 0, $j);
}
/**
* Function to clean json data before json_decode.
* @since 3.2
* @param $input String
* @return String
*/
public static function json_cleanup( $input ) {
/*
* Remove any unwated (corrupted?) characters from either side of our object.
*/
$l_trim = strpos( $input, '{' );
$r_trim = strrpos( $input, '}' ) - $l_trim + 1;
return substr( $input, $l_trim, $r_trim );
}
/**
* @param $search
* @param $replace
* @param $subject
* @return mixed
*/
public static function str_replace( $search, $replace, $subject ){
if( is_array( $subject ) ){
foreach( $subject as &$oneSubject )
$oneSubject = WPN_Helper::str_replace($search, $replace, $oneSubject);
unset($oneSubject);
return $subject;
} else {
return str_replace($search, $replace, $subject);
}
}
/**
* @param $value
* @param int $flag
* @return array|string
*/
public static function html_entity_decode( $value, $flag = ENT_COMPAT ){
$value = is_array($value) ?
array_map( 'WPN_Helper::html_entity_decode' , $value) :
html_entity_decode( $value, $flag );
return $value;
}
/**
* @param $value
* @return array|string
*/
public static function htmlspecialchars( $value ){
$value = is_array($value) ?
array_map( 'WPN_Helper::htmlspecialchars' , $value) :
htmlspecialchars( $value );
return $value;
}
/**
* @param $value
* @return array|string
*/
public static function stripslashes( $value ){
$value = is_array($value) ?
array_map( 'WPN_Helper::stripslashes' , $value) :
stripslashes($value);
return $value;
}
/**
* @param $value
* @return array|string
*/
public static function esc_html( $value )
{
$value = is_array($value) ?
array_map( 'WPN_Helper::esc_html' , $value) :
esc_html($value);
return $value;
}
/**
* @param $value
* @return array|string
*/
public static function kses_post( $value )
{
$value = is_array( $value ) ?
array_map( 'WPN_Helper::kses_post' , $value ) :
wp_kses_post($value);
return $value;
}
/**
* @param $value
* @return array|string
*/
public static function strip_tags( $value )
{
$value = is_array( $value ) ?
array_map( 'WPN_Helper::strip_tags' , $value ) :
strip_tags( $value );
return $value;
}
/**
* String to Bytes
*
* Converts PHP settings from a string to bytes.
*
* @param $size
* @return float
*/
public static function string_to_bytes( $size )
{
// Remove the non-unit characters from the size.
$unit = preg_replace('/[^bkmgtpezy]/i', '', $size);
// Remove the non-numeric characters from the size.
$size = preg_replace('/[^0-9\.]/', '', $size);
if ( $unit && is_array( $unit ) ) {
// Find the position of the unit in the ordered string which is the power of magnitude to multiply a kilobyte by.
$size *= pow( 1024, stripos( 'bkmgtpezy', $unit[0] ) );
}
return round($size);
}
public static function str_putcsv( $array, $delimiter = ',', $enclosure = '"', $terminator = "\n" ) {
// First convert associative array to numeric indexed array
$workArray = array();
foreach ($array as $key => $value) {
$workArray[] = $value;
}
$returnString = ''; # Initialize return string
$arraySize = count( $workArray ); # Get size of array
for ( $i=0; $i<$arraySize; $i++ ) {
// Nested array, process nest item
if ( is_array( $workArray[$i] ) ) {
$returnString .= self::str_putcsv( $workArray[$i], $delimiter, $enclosure, $terminator );
} else {
switch ( gettype( $workArray[$i] ) ) {
// Manually set some strings
case "NULL": $_spFormat = ''; break;
case "boolean": $_spFormat = ($workArray[$i] == true) ? 'true': 'false'; break;
// Make sure sprintf has a good datatype to work with
case "integer": $_spFormat = '%d'; break;
case "double": $_spFormat = '%0.2f'; break;
case "string": $_spFormat = '%s'; $workArray[$i] = str_replace("$enclosure", "$enclosure$enclosure", $workArray[$i]); break;
// Unknown or invalid items for a csv - note: the datatype of array is already handled above, assuming the data is nested
case "object":
case "resource":
default: $_spFormat = ''; break;
}
$returnString .= sprintf('%2$s'.$_spFormat.'%2$s', $workArray[$i], $enclosure);
$returnString .= ($i < ($arraySize-1)) ? $delimiter : $terminator;
}
}
// Done the workload, return the output information
return $returnString;
}
public static function get_query_string( $key, $default = FALSE )
{
if( ! isset( $_GET[ $key ] ) ) return $default;
$value = self::htmlspecialchars( $_GET[ $key ] );
if( is_array( $value ) ) $value = reset( $value );
return $value;
}
public static function sanitize_text_field( $data )
{
if( is_array( $data ) ){
return array_map( 'WPN_Helper::sanitize_text_field' , $data );
}
return sanitize_text_field( $data );
}
public static function get_plugin_version( $plugin )
{
$plugins = get_plugins();
if( ! isset( $plugins[ $plugin ] ) ) return false;
return $plugins[ $plugin ][ 'Version' ];
}
public static function is_func_disabled( $function )
{
if( ! function_exists( $function ) ) return true;
$disabled = explode( ',', ini_get( 'disable_functions' ) );
return in_array( $function, $disabled );
}
public static function maybe_unserialize( $original )
{
// Repalcement for https://codex.wordpress.org/Function_Reference/maybe_unserialize
if ( is_serialized( $original ) ){
// Ported with php5.2 support from https://magp.ie/2014/08/13/php-unserialize-string-after-non-utf8-characters-stripped-out/
$parsed = preg_replace_callback( '!s:(\d+):"(.*?)";!s', 'WPN_Helper::parse_utf8_serialized' , $original );
$parsed = @unserialize( $parsed );
return ( $parsed ) ? $parsed : unserialize( $original ); // Fallback if parse error.
}
return $original;
}
/**
* Function to fetch our cache from the upgrades table (if it exists there).
*
* @param $id (int) The form ID.
*
* @since 3.3.7
*/
public static function get_nf_cache( $id ) {
// See if we have the data in our table already.
global $wpdb;
$sql = "SELECT cache FROM `{$wpdb->prefix}nf3_upgrades` WHERE id = " . intval( $id );
$result = $wpdb->get_results( $sql, 'ARRAY_A' );
// If so...
if ( ! empty( $result ) ) {
// Unserialize the result.
$value = WPN_Helper::maybe_unserialize( $result[ 0 ][ 'cache' ] );
// Return it.
return $value;
} // Otherwise... (We don't have the data.)
else {
// Get it from the options table.
return get_option( 'nf_form_' . $id );
}
}
/**
* Function to insert or update our cache in the upgrades table (if it exists).
*
* @param $id (int) The form ID.
* @param $data (string) The form cache.
* @param $stage (int) The target stage of this update. Default to the current max stage.
*
* @since 3.3.7
* @updated 3.4.0
*/
public static function update_nf_cache( $id, $data, $stage = 0 ) {
$stage = ( $stage ) ? $stage : WPN_Helper::get_stage();
// Serialize our data.
$cache = serialize( $data );
global $wpdb;
// See if we've already got a record.
$sql = "SELECT id FROM `{$wpdb->prefix}nf3_upgrades` WHERE id = " . intval( $id );
$result = $wpdb->get_results( $sql, 'ARRAY_A' );
// If we don't already have the data...
if ( empty( $result ) ) {
// Insert it.
$sql = $wpdb->prepare( "INSERT INTO `{$wpdb->prefix}nf3_upgrades` (id, cache, stage) VALUES (%d, %s, %s)", intval( $id ), $cache, intval( $stage ) );
} // Otherwise... (We do have the data.)
else {
// Update the existing record.
$sql = $wpdb->prepare( "UPDATE `{$wpdb->prefix}nf3_upgrades` SET cache = %s, stage = %d WHERE id = %d", $cache, intval( $stage ), intval( $id ) );
}
$wpdb->query( $sql );
}
/**
* Function to retrieve our upgrade stage.
* Remove this after the cache has been resolved.
*
* @return int
*
* @since 3.4.0
*/
public static function get_stage() {
$ver = static::getNfDbVersion();
$stack = explode( '.', $ver );
return intval( array_pop( $stack ) );
}
/**
* Provide the current Ninja Forms database version.
*
* @return string
*/
protected static function getNfDbVersion( ):string {
$ver = Ninja_Forms::$db_version;
return $ver;
}
/**
* Function to build our form cache from the table.
*
* @param $id (int) The form ID.
* @since 3.3.18
* @return $form_cache Array of form data.
* @updated 3.4.0
*/
public static function build_nf_cache( $id ) {
$form = Ninja_Forms()->form( $id )->get();
$form_cache = array(
'id' => $id,
'fields' => array(),
'actions' => array(),
'settings' => $form->get_settings(),
);
$fields = Ninja_Forms()->form( $id )->get_fields();
foreach( $fields as $field ){
// If the field is set.
if ( ! is_null( $field ) && ! empty( $field ) ) {
array_push( $form_cache[ 'fields' ], array( 'settings' => $field->get_settings(), 'id' => $field->get_id() ) );
}
}
$actions = Ninja_Forms()->form( $id )->get_actions();
foreach( $actions as $action ){
// If the action is set.
if ( ! is_null( $action ) && ! empty( $action ) ) {
array_push( $form_cache[ 'actions' ], array( 'settings' => $action->get_settings(), 'id' => $action->get_id() ) );
}
}
static::update_nf_cache( $id, $form_cache );
return $form_cache;
}
/**
* Function to delete our cache.
*
* @param $id (int) The form ID.
*
* @since 3.3.7
*/
public static function delete_nf_cache( $id ) {
global $wpdb;
$sql = "DELETE FROM `{$wpdb->prefix}nf3_upgrades` WHERE id = " . intval( $id );
$wpdb->query( $sql );
delete_option( 'nf_form_' . intval( $id ) );
}
private static function parse_utf8_serialized( $matches )
{
if ( isset( $matches[2] ) ){
return 's:'.strlen($matches[2]).':"'.$matches[2].'";';
}
}
/**
* This funtion gets/creates the Ninja Forms gate keeper( a random integer
* between 1 and 100 ). We will use this number when deciding whether a
* particular install is eligible for an upgrade or whatever else we decide
* to use it for
*
* @return int $zuul
*
* @since 3.4.0
*/
public static function get_zuul() {
$zuul = get_option( 'ninja_forms_zuul', -1 );
if( -1 === $zuul ) {
$zuul = rand( 1, 100 );
update_option( 'ninja_forms_zuul', $zuul, false );
}
return $zuul;
}
/**
* This function will return true/false based on an option( ninja_forms_zuul )
* and a threshold that we set. We can use this to limit updates
*
* @param $threshold
*
* @return bool
*
* @since 3.4.0
*/
public static function gated_release( $threshold = 0 ) {
$gatekeeper = $threshold >= self::get_zuul();
$gatekeeper = apply_filters( 'ninja_forms_gatekeeper', $gatekeeper );
return $gatekeeper;
}
/**
* Is Maintenance
*
* Checks the upgrades table to see if the form the user is viewing
* is under maintenance mode.
*
* @since 3.4.0
*
* @param $form_id - The ID of the form we are checking.
*
* @return boolean
*/
public static function form_in_maintenance( $form_id ) {
global $wpdb;
$db_version = get_option( 'ninja_forms_db_version' );
if( ! $db_version ) return false;
// Exit early if the column doesn't exist.
if( version_compare( '1.3', $db_version, '>' ) ) return false;
// Get our maintenance value from the DB and return it at the zero position.
$maintenance = $wpdb->get_row(
"SELECT `maintenance` FROM `{$wpdb->prefix}nf3_upgrades` WHERE `id` = {$form_id}", 'ARRAY_A'
);
/*
* If maintenance isn't empty and basic on maintenance's value
* return a boolean value.
*/
if( ! empty( $maintenance ) && 1 == $maintenance[ 'maintenance' ] ) {
return true;
} else {
return false;
}
}
/**
* This function either put all forms in maintenance mode or remove maintenance
* mode for all forms. Depending on the input parameters
*
* @since 3.4.0
*
* @param $mode - Default 0 ( Take all forms out of maintenance mode )
*/
public static function set_forms_maintenance_mode( $mode = 0 ) {
global $wpdb;
// default is 0, so if we get passed bad data, just use 0
if( ! in_array( $mode, array( 0, 1 ) ) ) {
$mode = 0;
}
// set maintenance flag to $mode (0 or 1)
$sql = $wpdb->prepare( "UPDATE `{$wpdb->prefix}nf3_upgrades` SET "
. "maintenance = %d", intval( $mode ) );
$wpdb->query( $sql );
}
/**
* We'll use to determine if we need to use the form cache or not. This will
* be used for all users not on the newest version of the database
*
* @return boolean
*/
public static function use_cache() {
return true;
$cache_mode = intval( get_option('ninja_forms_cache_mode') );
// if we've already decided to use the cache return true and exit.
if( 0 < $cache_mode ) return true;
$db_version = get_option('ninja_forms_db_version');
// If not in cache mode, get the db version and return true if we aren't at a certain threshold version-wise
if( ! $db_version || version_compare($db_version, '1.4', '<' )) {
return true;
}
$finished_updates = get_option( 'ninja_forms_required_updates', false );
// make sure we've run the lastest update to reconcile db with cache field values
if( $finished_updates && !isset( $finished_updates[ 'CacheFieldReconcilliation' ] ) ) {
return true;
}
return false;
}
/**
* Sanitizes single/multiple CSS classNames
*
* Explodes on space, sanitize each className, implode with space to recombine
* @param string $value
* @return string
*/
public static function sanitize_classes($value):string {
$outgoing = $value;
$sanitized = [];
$exploded = explode(' ',$value);
foreach($exploded as $singleClass){
$sanitized[] = sanitize_html_class($singleClass);
}
$outgoing = implode(' ',$sanitized);
return $outgoing;
}
/**
* Sanitizes string values for field settings
*
* WIP methods can still be implemented for this.
*
* @param string $key Setting name
* @param string $value of setting
* @return string sanitized value for setting
*/
public static function sanitize_string_setting_value($key, $value):string {
if( in_array( $key, ["element_class", "container_class"] ) ) {
$value = self::sanitize_classes($value);
} else if( in_array( $key, ["label", "default"] )){
$value = self::sanitize_text_field($value);
}
return $value;
}
/**
* Check the DISALLOW_UNFILTERED_HTML constant value and return early if true.
* If false, return opposite for 'unfiltered_html' current user capability
*
* @return bool
*/
public static function maybe_disallow_unfiltered_html_for_sanitization():bool {
/**
* Exit early if the config setting is TRUE to mimic WordPress capability check.
*/
if( defined( 'DISALLOW_UNFILTERED_HTML' ) && DISALLOW_UNFILTERED_HTML ) return true;
$disallow_unfiltered_html = ! current_user_can( 'unfiltered_html' );
return $disallow_unfiltered_html;
}
/**
* Check the DISALLOW_UNFILTERED_HTML constant value only on the escaping side
*
* @return bool
*/
public static function maybe_disallow_unfiltered_html_for_escaping():bool {
// Default intentinally left set to false to avoid breaking countless pre-existing forms using this feature.
$disallow_unfiltered_html = defined( 'DISALLOW_UNFILTERED_HTML' ) ? DISALLOW_UNFILTERED_HTML : false;
return $disallow_unfiltered_html;
}
/**
* Sanitize output to csv to prevent formula injection.
*
* @param String $value The value to be escaped.
* @return String
*/
public static function maybe_escape_csv_column( $value ):string {
if (!is_string($value) && !is_numeric($value)) {
if(is_array($value)){
$value = implode(' ', $value);
}else{
throw new Exception('Incoming value to maybe_escape_csv_column is neither string nor array');
}
}
if( 0 < strlen($value ) ) {
$first_char = substr( $value, 0, 1 );
if( in_array( $first_char, array( '=', '@', '+', '-' ) ) ) {
$value = "'" . $value;
}
}
return $value;
}
} // End Class WPN_Helper
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