Introducing coding standards validation.

vendor/wp-coding-standards/wpcs/WordPress/Sniffs/PHP/StrictComparisonsSniff.php

@@ -0,0 +1,56 @@
+<?php
+/**
+ * WordPress Coding Standard.
+ *
+ * @package WPCS\WordPressCodingStandards
+ * @link    https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards
+ * @license https://opensource.org/licenses/MIT MIT
+ */
+
+namespace WordPress\Sniffs\PHP;
+
+use WordPress\Sniff;
+
+/**
+ * Enforces Strict Comparison checks, based upon Squiz code.
+ *
+ * @package WPCS\WordPressCodingStandards
+ *
+ * @since   0.4.0
+ * @since   0.13.0 Class name changed: this class is now namespaced.
+ *
+ * Last synced with base class ?[unknown date]? at commit ?[unknown commit]?.
+ * It is currently unclear whether this sniff is actually based on Squiz code on whether the above
+ * reference to it is a copy/paste oversight.
+ * @link    Possibly: https://github.com/squizlabs/PHP_CodeSniffer/blob/master/CodeSniffer/Standards/Squiz/Sniffs/Operators/ComparisonOperatorUsageSniff.php
+ */
+class StrictComparisonsSniff extends Sniff {
+
+	/**
+	 * Returns an array of tokens this test wants to listen for.
+	 *
+	 * @return array
+	 */
+	public function register() {
+		return array(
+			\T_IS_EQUAL,
+			\T_IS_NOT_EQUAL,
+		);
+	}
+
+	/**
+	 * Processes this test, when one of its tokens is encountered.
+	 *
+	 * @param int $stackPtr The position of the current token in the stack.
+	 *
+	 * @return void
+	 */
+	public function process_token( $stackPtr ) {
+
+		if ( ! $this->has_whitelist_comment( 'loose comparison', $stackPtr ) ) {
+			$error = 'Found: ' . $this->tokens[ $stackPtr ]['content'] . '. Use strict comparisons (=== or !==).';
+			$this->phpcsFile->addWarning( $error, $stackPtr, 'LooseComparison' );
+		}
+	}
+
+}