Use strict comparison

admin/admin.php

@@ -215,7 +215,7 @@ static function ( $result, $option, $value ) {
 			'wpcf7_contact_forms_per_page',
 		);
 
-		if ( in_array( $option, $wpcf7_screens ) ) {
+		if ( in_array( $option, $wpcf7_screens, true ) ) {
 			$result = $value;
 		}
 
@@ -275,7 +275,7 @@ function wpcf7_load_contact_form_admin() {
 
 		if ( ! $contact_form ) {
 			$query['message'] = 'failed';
-		} elseif ( -1 == $id ) {
+		} elseif ( -1 === (int) $id ) {
 			$query['message'] = 'created';
 		} else {
 			$query['message'] = 'saved';
@@ -405,7 +405,7 @@ function wpcf7_admin_management_page() {
 		return;
 	}
 
-	if ( 'validate' == wpcf7_current_action()
+	if ( 'validate' === wpcf7_current_action()
 	and wpcf7_validate_configuration()
 	and current_user_can( 'wpcf7_edit_contact_forms' ) ) {
 		wpcf7_admin_bulk_validate_page();
@@ -552,7 +552,7 @@ function wpcf7_admin_integration_page() {
 add_action( 'wpcf7_admin_notices', 'wpcf7_admin_updated_message', 10, 3 );
 
 function wpcf7_admin_updated_message( $page, $action, $object ) {
-	if ( ! in_array( $page, array( 'wpcf7', 'wpcf7-new' ) ) ) {
+	if ( ! in_array( $page, array( 'wpcf7', 'wpcf7-new' ), true ) ) {
 		return;
 	}
 
@@ -607,7 +607,7 @@ function wpcf7_admin_updated_message( $page, $action, $object ) {
 add_filter( 'plugin_action_links', 'wpcf7_plugin_action_links', 10, 2 );
 
 function wpcf7_plugin_action_links( $links, $file ) {
-	if ( $file != WPCF7_PLUGIN_BASENAME ) {
+	if ( WPCF7_PLUGIN_BASENAME !== $file ) {
 		return $links;
 	}
 

admin/includes/class-contact-forms-list-table.php

@@ -42,19 +42,19 @@ public function prepare_items() {
 		}
 
 		if ( ! empty( $_REQUEST['orderby'] ) ) {
-			if ( 'title' == $_REQUEST['orderby'] ) {
+			if ( 'title' === $_REQUEST['orderby'] ) {
 				$args['orderby'] = 'title';
-			} elseif ( 'author' == $_REQUEST['orderby'] ) {
+			} elseif ( 'author' === $_REQUEST['orderby'] ) {
 				$args['orderby'] = 'author';
-			} elseif ( 'date' == $_REQUEST['orderby'] ) {
+			} elseif ( 'date' === $_REQUEST['orderby'] ) {
 				$args['orderby'] = 'date';
 			}
 		}
 
 		if ( ! empty( $_REQUEST['order'] ) ) {
-			if ( 'asc' == strtolower( $_REQUEST['order'] ) ) {
+			if ( 'asc' === strtolower( $_REQUEST['order'] ) ) {
 				$args['order'] = 'ASC';
-			} elseif ( 'desc' == strtolower( $_REQUEST['order'] ) ) {
+			} elseif ( 'desc' === strtolower( $_REQUEST['order'] ) ) {
 				$args['order'] = 'DESC';
 			}
 		}

admin/includes/config-validator.php

@@ -60,10 +60,10 @@ function wpcf7_admin_warnings_bulk_cv( $page, $action, $object ) {
 add_action( 'wpcf7_admin_load', 'wpcf7_load_bulk_validate_page', 10, 2 );
 
 function wpcf7_load_bulk_validate_page( $page, $action ) {
-	if ( 'wpcf7' != $page
-	or 'validate' != $action
+	if ( 'wpcf7' !== $page
+	or 'validate' !== $action
 	or ! wpcf7_validate_configuration()
-	or 'POST' != $_SERVER['REQUEST_METHOD'] ) {
+	or 'POST' !== $_SERVER['REQUEST_METHOD'] ) {
 		return;
 	}
 

admin/includes/welcome-panel.php

@@ -276,7 +276,7 @@ function wpcf7_welcome_panel_screen_settings( $screen_settings, $screen ) {
 	);
 
 	$checkbox_id = 'wpcf7-welcome-panel-show';
-	$checked = ! in_array( wpcf7_version( 'only_major=1' ), $vers );
+	$checked = ! in_array( wpcf7_version( 'only_major=1' ), $vers, true );
 
 	$checkbox = sprintf(
 		'<input %s />',

includes/config-validator/mail.php

@@ -273,7 +273,7 @@ public function validate_mail_additional_headers( $template, $content ) {
 
 			if (
 				in_array(
-					strtolower( $header_name ), array( 'reply-to', 'cc', 'bcc' )
+					strtolower( $header_name ), array( 'reply-to', 'cc', 'bcc' ), true
 				) and
 				'' !== $header_value and
 				$this->detect_invalid_mailbox_syntax( $section, $header_value )
@@ -283,7 +283,7 @@ public function validate_mail_additional_headers( $template, $content ) {
 			}
 
 			if (
-				in_array( strtolower( $header_name ), array( 'cc', 'bcc' ) ) and
+				in_array( strtolower( $header_name ), array( 'cc', 'bcc' ), true ) and
 				$this->detect_unsafe_email_without_protection( $section, $header_value )
 			) {
 				$unsafe_email_fields[] = $header_name;

includes/contact-form-functions.php

@@ -300,7 +300,7 @@ function wpcf7_save_contact_form( $data = '', $context = 'save' ) {
 
 	$data['id'] = (int) $data['id'];
 
-	if ( -1 == $data['id'] ) {
+	if ( -1 === $data['id'] ) {
 		$contact_form = WPCF7_ContactForm::get_template();
 	} else {
 		$contact_form = wpcf7_contact_form( $data['id'] );
@@ -347,7 +347,7 @@ function wpcf7_save_contact_form( $data = '', $context = 'save' ) {
 
 	do_action( 'wpcf7_save_contact_form', $contact_form, $data, $context );
 
-	if ( 'save' == $context ) {
+	if ( 'save' === $context ) {
 		$contact_form->save();
 	}
 

includes/contact-form-template.php

@@ -3,13 +3,13 @@
 class WPCF7_ContactFormTemplate {
 
 	public static function get_default( $prop = 'form' ) {
-		if ( 'form' == $prop ) {
+		if ( 'form' === $prop ) {
 			$template = self::form();
-		} elseif ( 'mail' == $prop ) {
+		} elseif ( 'mail' === $prop ) {
 			$template = self::mail();
-		} elseif ( 'mail_2' == $prop ) {
+		} elseif ( 'mail_2' === $prop ) {
 			$template = self::mail_2();
-		} elseif ( 'messages' == $prop ) {
+		} elseif ( 'messages' === $prop ) {
 			$template = self::messages();
 		} else {
 			$template = null;

includes/contact-form.php

@@ -528,7 +528,7 @@ public function form_html( $options = '' ) {
 
 		$this->shortcode_atts = $options;
 
-		if ( 'raw_form' == $options['output'] ) {
+		if ( 'raw_form' === $options['output'] ) {
 			return sprintf(
 				'<pre class="wpcf7-raw-form"><code>%s</code></pre>',
 				esc_html( $this->prop( 'form' ) )
@@ -584,7 +584,7 @@ public function form_html( $options = '' ) {
 			wpcf7_format_atts( array(
 				'class' => 'wpcf7 no-js',
 				'id' => $this->unit_tag(),
-				( get_option( 'html_type' ) == 'text/html' ) ? 'lang' : 'xml:lang'
+				( get_option( 'html_type' ) === 'text/html' ) ? 'lang' : 'xml:lang'
 					=> $lang_tag,
 				'dir' => wpcf7_is_rtl( $this->locale ) ? 'rtl' : 'ltr',
 				'data-wpcf7-id' => $this->id(),
@@ -982,11 +982,11 @@ public function collect_mail_tags( $options = '' ) {
 			if ( empty( $type ) ) {
 				continue;
 			} elseif ( ! empty( $options['include'] ) ) {
-				if ( ! in_array( $type, $options['include'] ) ) {
+				if ( ! in_array( $type, $options['include'], true ) ) {
 					continue;
 				}
 			} elseif ( ! empty( $options['exclude'] ) ) {
-				if ( in_array( $type, $options['exclude'] ) ) {
+				if ( in_array( $type, $options['exclude'], true ) ) {
 					continue;
 				}
 			}
@@ -1155,7 +1155,7 @@ public function additional_setting( $name, $max = 1 ) {
 
 		foreach ( $settings as $setting ) {
 			if ( preg_match( $pattern, $setting, $matches ) ) {
-				if ( $matches[1] != $name ) {
+				if ( $matches[1] !== $name ) {
 					continue;
 				}
 

includes/file.php

@@ -209,7 +209,7 @@ static function ( $type ) {
 				if ( false === strpos( $type, '/' ) ) {
 					return sprintf( '.%s', trim( $type, '.' ) );
 				} elseif ( preg_match( '%^([a-z]+)/[*]$%i', $type, $matches ) ) {
-					if ( in_array( $matches[1], array( 'audio', 'video', 'image' ) ) ) {
+					if ( in_array( $matches[1], array( 'audio', 'video', 'image' ), true ) ) {
 						return $type;
 					} else {
 						return '';
@@ -360,9 +360,7 @@ function wpcf7_cleanup_upload_files( $seconds = 60, $max = 100 ) {
 
 	if ( $handle = opendir( $dir ) ) {
 		while ( false !== ( $file = readdir( $handle ) ) ) {
-			if ( '.' == $file
-			or '..' == $file
-			or '.htaccess' == $file ) {
+			if ( '.' === $file or '..' === $file or '.htaccess' === $file ) {
 				continue;
 			}
 

includes/form-tag.php

@@ -75,7 +75,7 @@ public function get_option( $option_name, $pattern = '', $single = false ) {
 			$pattern = $preset_patterns[$pattern];
 		}
 
-		if ( '' == $pattern ) {
+		if ( '' === $pattern ) {
 			$pattern = '.+';
 		}
 
@@ -350,9 +350,9 @@ public function get_default_option( $default_value = '', $args = '' ) {
 		foreach ( $options as $opt ) {
 			$opt = sanitize_key( $opt );
 
-			if ( 'user_' == substr( $opt, 0, 5 ) and is_user_logged_in() ) {
+			if ( 'user_' === substr( $opt, 0, 5 ) and is_user_logged_in() ) {
 				$primary_props = array( 'user_login', 'user_email', 'user_url' );
-				$opt = in_array( $opt, $primary_props ) ? $opt : substr( $opt, 5 );
+				$opt = in_array( $opt, $primary_props, true ) ? $opt : substr( $opt, 5 );
 
 				$user = wp_get_current_user();
 				$user_prop = $user->get( $opt );

includes/form-tags-manager.php

@@ -230,8 +230,7 @@ public function normalize( $content ) {
 	 */
 	private function normalize_callback( $matches ) {
 		// allow [[foo]] syntax for escaping a tag
-		if ( $matches[1] == '['
-		and $matches[6] == ']' ) {
+		if ( '[' === $matches[1] and ']' === $matches[6] ) {
 			return $matches[0];
 		}
 
@@ -466,8 +465,7 @@ private function replace_callback( $matches ) {
 	 */
 	private function scan_callback( $matches, $replace = false ) {
 		// allow [[foo]] syntax for escaping a tag
-		if ( $matches[1] == '['
-		and $matches[6] == ']' ) {
+		if ( '[' === $matches[1] and ']' === $matches[6] ) {
 			return substr( $matches[0], 1, -1 );
 		}
 

includes/formatting.php

@@ -143,7 +143,7 @@ function wpcf7_normalize_newline( $text, $to = "\n" ) {
 
 	$nls = array( "\r\n", "\r", "\n" );
 
-	if ( ! in_array( $to, $nls ) ) {
+	if ( ! in_array( $to, $nls, true ) ) {
 		return $text;
 	}
 
@@ -215,7 +215,8 @@ function wpcf7_canonicalize( $text, $options = '' ) {
 
 		$is_utf8 = in_array(
 			$charset,
-			array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' )
+			array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ),
+			true
 		);
 
 		if ( $is_utf8 ) {
@@ -235,13 +236,13 @@ function wpcf7_canonicalize( $text, $options = '' ) {
 		$text = preg_replace( '/[\r\n\t ]+/', ' ', $text );
 	}
 
-	if ( 'lower' == $options['strto'] ) {
+	if ( 'lower' === $options['strto'] ) {
 		if ( function_exists( 'mb_strtolower' ) ) {
 			$text = mb_strtolower( $text, $charset );
 		} else {
 			$text = strtolower( $text );
 		}
-	} elseif ( 'upper' == $options['strto'] ) {
+	} elseif ( 'upper' === $options['strto'] ) {
 		if ( function_exists( 'mb_strtoupper' ) ) {
 			$text = mb_strtoupper( $text, $charset );
 		} else {
@@ -550,7 +551,7 @@ function wpcf7_format_atts( $atts ) {
 			'selected',
 		);
 
-		if ( in_array( $name, $boolean_attributes ) and '' === $value ) {
+		if ( in_array( $name, $boolean_attributes, true ) and '' === $value ) {
 			$value = false;
 		}
 

includes/functions.php

@@ -20,8 +20,7 @@ function wpcf7_plugin_path( $path = '' ) {
 function wpcf7_plugin_url( $path = '' ) {
 	$url = plugins_url( $path, WPCF7_PLUGIN );
 
-	if ( is_ssl()
-	and 'http:' == substr( $url, 0, 5 ) ) {
+	if ( is_ssl() and 'http:' === substr( $url, 0, 5 ) ) {
 		$url = 'https:' . substr( $url, 5 );
 	}
 
@@ -67,9 +66,9 @@ function wpcf7_upload_dir( $type = false ) {
 		'url' => $uploads['baseurl'],
 	) );
 
-	if ( 'dir' == $type ) {
+	if ( 'dir' === $type ) {
 		return $uploads['dir'];
-	} if ( 'url' == $type ) {
+	} if ( 'url' === $type ) {
 		return $uploads['url'];
 	}
 
@@ -359,7 +358,7 @@ function wpcf7_enctype_value( $enctype ) {
 		'text/plain',
 	);
 
-	if ( in_array( $enctype, $valid_enctypes ) ) {
+	if ( in_array( $enctype, $valid_enctypes, true ) ) {
 		return $enctype;
 	}
 
@@ -406,8 +405,7 @@ function wpcf7_rmdir_p( $dir ) {
 
 	if ( $handle = opendir( $dir ) ) {
 		while ( false !== ( $file = readdir( $handle ) ) ) {
-			if ( $file == "."
-			or $file == ".." ) {
+			if ( '.' === $file or '..' === $file ) {
 				continue;
 			}
 
@@ -505,7 +503,7 @@ function wpcf7_count_code_units( $text ) {
  */
 function wpcf7_is_localhost() {
 	$sitename = wp_parse_url( network_home_url(), PHP_URL_HOST );
-	return in_array( strtolower( $sitename ), array( 'localhost', '127.0.0.1' ) );
+	return in_array( strtolower( $sitename ), array( 'localhost', '127.0.0.1' ), true );
 }
 
 
@@ -688,9 +686,9 @@ function wpcf7_anonymize_ip_addr( $ip_addr ) {
 		return $ip_addr;
 	}
 
-	if ( 4 == strlen( $packed ) ) { // IPv4
+	if ( 4 === strlen( $packed ) ) { // IPv4
 		$mask = '255.255.255.0';
-	} elseif ( 16 == strlen( $packed ) ) { // IPv6
+	} elseif ( 16 === strlen( $packed ) ) { // IPv6
 		$mask = 'ffff:ffff:ffff:0000:0000:0000:0000:0000';
 	} else {
 		return $ip_addr;