diff --git a/.github/workflows/check-syntax.yml b/.github/workflows/check-syntax.yml
new file mode 100644
index 0000000000..9fee143253
--- /dev/null
+++ b/.github/workflows/check-syntax.yml
@@ -0,0 +1,27 @@
+name: Check Syntax
+
+on:
+  pull_request:
+  push:
+
+jobs:
+  check-syntax:
+    name: PHP
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+      -
+        name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          # This should be the value of Concrete\Core\Install\Preconditions\PhpVersion::MINIMUM_PHP_VERSION
+          php-version: 7.3
+          extensions: opcache
+          ini-values: opcache.enable_cli=1
+          coverage: none
+          tools: none
+      -
+        name: Check syntax
+        run: php ./tests/check-syntax.php
diff --git a/tests/check-syntax.php b/tests/check-syntax.php
new file mode 100644
index 0000000000..5aff7abe25
--- /dev/null
+++ b/tests/check-syntax.php
@@ -0,0 +1,118 @@
+<?php
+
+declare(strict_types=1);
+
+set_error_handler(
+    static function($errno, $errstr, $errfile, $errline): void {
+        $message = trim((string) $errstr) ?: 'Error {$errno}';
+        if ($errfile && $errfile !== 'Unknown') {
+            $message .= "\nFile: {$errfile}";
+            if ($errline) {
+                $message .= "\nLine: {$errline}";
+            }
+        }
+        throw new RuntimeException($message);
+    },
+    -1
+);
+
+class Checker
+{
+    /**
+     * @var string
+     */
+    private $rootDir;
+
+    public function __construct()
+    {
+        $this->rootDir = str_replace(DIRECTORY_SEPARATOR, '/', dirname(__DIR__));
+    }
+
+    /**
+     * @return string[]
+     */
+    public function check(): array
+    {
+        $errors = [];
+        foreach ($this->listFiles('concrete') as $phpFile) {
+            if ($this->isSkipFile($phpFile)) {
+                continue;
+            }
+            $error = $this->checkFile($phpFile);
+            if ($error !== '') {
+                $errors[] = $error;
+            }
+        }
+
+        return $errors;
+    }
+
+    private function checkFile(string $phpFile): string
+    {
+        try {
+            $compiled = opcache_compile_file($this->rootDir . '/' . $phpFile);
+        } catch (ParseError $x) {
+            return trim($x->getMessage()) . "\nFile: {$phpFile}\nLine: {$x->getLine()}";
+        }
+        if ($compiled !== true) {
+            return "Compilation failed\nFile: {$phpFile}";
+        }
+        return '';
+    }
+
+    /**
+     * @return \Generator<string>
+     */
+    private function listFiles(string $parentRelativeDir): Generator
+    {
+        $parentAbsoluteDir = $this->rootDir . ($parentRelativeDir === '' ? '' : "/{$parentRelativeDir}");
+        $items = scandir($parentAbsoluteDir);
+        if ($items === false) {
+            throw new RuntimeException("Failed to list contents of directory {$parentAbsoluteDir}");
+        }
+        foreach ($items as $item) {
+            if (in_array($item, ['.', '..', 'vendor'], true)) {
+                continue;
+            }
+            $itemRelative = ($parentRelativeDir === '' ? '' : "{$parentRelativeDir}/") . $item;
+            if (is_dir($parentAbsoluteDir . '/' . $item)) {
+                foreach ($this->listFiles($itemRelative) as $found) {
+                    yield $found;
+                }
+            } elseif (preg_match('/^[^.].*\.php$/', $item)) {
+                yield $itemRelative;
+            }
+        }
+    }
+
+    private function isSkipFile(string $phpFile): bool
+    {
+        return in_array($phpFile, [
+            'concrete/src/Support/__IDE_SYMBOLS__.php',
+            'concrete/src/Support/.phpstorm.meta.php',
+        ], true);
+    }
+}
+
+if (!function_exists('opcache_get_status')) {
+    echo "OPcache is not installed.\n";
+    exit(1);
+}
+if (opcache_get_status() === false) {
+    echo "OPcache is not enabled.\nYou may need to add this line to php.ini:\nopcache.enable_cli=1\n";
+    exit(2);
+}
+
+$checker = new Checker();
+printf("Checking files with PHP %s (please be sure it's the minimum version supported by the core)... ", PHP_VERSION);
+$errors = $checker->check();
+if ($errors === []) {
+    echo "no errors found.\n";
+} else {
+    echo "ERRORS FOUND!\n";
+    foreach ($errors as $index => $error) {
+        echo 'Error #', $index + 1, ') ', $error, "\n";
+    }
+}
+
+exit($errors === [] ? 0 : 3);