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2026-05-12 21:10:38 +02:00
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+<?php
+/**
+ * Requirements check for PHP_CodeSniffer.
+ *
+ * :WARNING:
+ *   This file MUST stay cross-version compatible with older PHP versions (min: PHP 5.3) to allow
+ *   for the requirements check to work correctly.
+ *
+ *   The PHP 5.3 minimum is set as the previous PHPCS major (3.x) already had a PHP 5.4 minimum
+ *   requirement and didn't take parse errors caused due to the use of namespaces into account
+ *   in its requirements check, so running PHPCS 3.x on PHP < 5.3 would have failed with a parse
+ *   error already anyway, so PHP 5.3 seems reasonable to keep as the minimum for this.
+ * :WARNING:
+ *
+ * @author    Greg Sherwood <gsherwood@squiz.net>
+ * @author    Juliette Reinders Folmer <phpcs_nospam@adviesenzo.nl>
+ * @copyright 2006-2023 Squiz Pty Ltd (ABN 77 084 670 600)
+ * @copyright 2023 PHPCSStandards and contributors
+ * @license   https://github.com/PHPCSStandards/PHP_CodeSniffer/blob/HEAD/licence.txt BSD Licence
+ */
+
+namespace PHP_CodeSniffer;
+
+
+/**
+ * Exits if the minimum requirements of PHP_CodeSniffer are not met.
+ *
+ * @return void
+ */
+function checkRequirements()
+{
+    // IMPORTANT: Must stay in sync with the value of the `PHP_CodeSniffer\Util\ExitCode::REQUIREMENTS_NOT_MET` constant!
+    $exitCode = 64;
+
+    // Check the PHP version.
+    if (PHP_VERSION_ID < 70200) {
+        $error = 'ERROR: PHP_CodeSniffer requires PHP version 7.2.0 or greater.' . PHP_EOL;
+        fwrite(STDERR, $error);
+        exit($exitCode);
+    }
+
+    $requiredExtensions = array(
+        'tokenizer',
+        'xmlwriter',
+        'SimpleXML',
+    );
+    $missingExtensions  = array();
+
+    foreach ($requiredExtensions as $extension) {
+        if (extension_loaded($extension) === false) {
+            $missingExtensions[] = $extension;
+        }
+    }
+
+    if (empty($missingExtensions) === false) {
+        $last      = array_pop($requiredExtensions);
+        $required  = implode(', ', $requiredExtensions);
+        $required .= ' and ' . $last;
+
+        if (count($missingExtensions) === 1) {
+            $missing = $missingExtensions[0];
+        } else {
+            $last     = array_pop($missingExtensions);
+            $missing  = implode(', ', $missingExtensions);
+            $missing .= ' and ' . $last;
+        }
+
+        $error = 'ERROR: PHP_CodeSniffer requires the %s extensions to be enabled. Please enable %s.' . PHP_EOL;
+        fwrite(STDERR, sprintf($error, $required, $missing));
+        exit($exitCode);
+    }
+}