Add is_class_property() utility method and implement use of this an…

…d the other two new utility methods.

PR 1089 introduced two new utility methods to the `WordPress\Sniff` class: `is_class_constant()` and `valid_direct_scope()`.

This PR introduces one additional utility method `is_class_property()` and implements the use of this and the other two methods in other places in the code where appropriate (other than where they were originally introduced for).

WordPress/Sniff.php

@@ -1777,7 +1777,12 @@ protected function get_use_type( $stackPtr ) {
 		}
 
 		// USE keywords for traits.
-		if ( $this->phpcsFile->hasCondition( $stackPtr, array( T_CLASS, T_ANON_CLASS, T_TRAIT ) ) ) {
+		$valid_scopes = array(
+			'T_CLASS'      => true,
+			'T_ANON_CLASS' => true,
+			'T_TRAIT'      => true,
+		);
+		if ( true === $this->valid_direct_scope( $stackPtr, $valid_scopes ) ) {
 			return 'trait';
 		}
 
@@ -2244,6 +2249,35 @@ public function is_class_constant( $stackPtr ) {
 		return $this->valid_direct_scope( $stackPtr, $valid_scopes );
 	}
 
+	/**
+	 * Check whether a T_VARIABLE token is a class property declaration.
+	 *
+	 * @param int $stackPtr  The position in the stack of the T_VARIABLE token to verify.
+	 *
+	 * @return bool
+	 */
+	public function is_class_property( $stackPtr ) {
+		if ( ! isset( $this->tokens[ $stackPtr ] ) || T_VARIABLE !== $this->tokens[ $stackPtr ]['code'] ) {
+			return false;
+		}
+
+		// Note: interfaces can not declare properties.
+		$valid_scopes = array(
+			'T_CLASS'      => true,
+			'T_ANON_CLASS' => true,
+			'T_TRAIT'      => true,
+		);
+
+		if ( $this->valid_direct_scope( $stackPtr, $valid_scopes ) ) {
+			// Make sure it's not a method parameter.
+			if ( empty( $this->tokens[ $stackPtr ]['nested_parenthesis'] ) ) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
 	/**
 	 * Check whether the direct wrapping scope of a token is within a limited set of
 	 * acceptable tokens.

WordPress/Sniffs/NamingConventions/PrefixAllGlobalsSniff.php

@@ -270,7 +270,7 @@ public function process_token( $stackPtr ) {
 
 				case 'T_CONST':
 					// Constants in a class do not need to be prefixed.
-					if ( $this->phpcsFile->hasCondition( $stackPtr, array( T_CLASS, T_ANON_CLASS, T_INTERFACE, T_TRAIT ) ) === true ) {
+					if ( true === $this->is_class_constant( $stackPtr ) ) {
 						return;
 					}
 
@@ -488,11 +488,7 @@ protected function process_variable_assignment( $stackPtr ) {
 			}
 
 			// Properties in a class do not need to be prefixed.
-			$conditions = array_keys( $this->tokens[ $stackPtr ]['conditions'] );
-			$ptr        = array_pop( $conditions );
-			if ( isset( $this->tokens[ $ptr ] )
-				&& in_array( $this->tokens[ $ptr ]['code'], array( T_CLASS, T_ANON_CLASS, T_TRAIT ), true )
-			) {
+			if ( true === $this->is_class_property( $stackPtr ) ) {
 				return;
 			}