A Laravel-inspired PHP SDK for building Claude Code hook responses with a clean, fluent API. This SDK makes it easy to create structured JSON responses for Claude Code hooks using an expressive, chainable interface.
Claude Code hooks are user-defined shell commands that execute at specific points in Claude Code's lifecycle, providing deterministic control over its behavior. For more details, see the Claude Code Hooks documentation.
You can install the package via composer:
composer require beyondcode/claude-hooks-sdkHere's how to create a PHP script that Claude Code can use as a hook:
Create a new PHP file (e.g., validate-code.php) using the SDK:
<?php
require 'vendor/autoload.php';
use BeyondCode\ClaudeHooks\ClaudeHook;
// Read the hook data from stdin.
// This will automatically return the correct Hook instance (for example PreToolUse)
$hook = ClaudeHook::create();
// Example: Validate bash commands
if ($hook->toolName() === 'Bash') {
$command = $hook->toolInput('command', '');
// Check for potentially dangerous commands
if (str_contains($command, 'rm -rf')) {
// Block the tool call with feedback
$hook->response()->block('Dangerous command detected. Use caution with rm -rf commands.');
}
}
// Allow other tool calls to proceed
$hook->success();- Run the
/hookscommand in Claude Code - Select the
PreToolUsehook event (runs before tool execution) - Add a matcher (e.g.,
Bashto match shell commands) - Add your hook command:
php /path/to/your/validate-code.php - Save to user or project settings
Your hook is now active and will validate commands before Claude Code executes them!
The SDK automatically creates the appropriate hook type based on the input:
use BeyondCode\ClaudeHooks\ClaudeHook;
use BeyondCode\ClaudeHooks\Hooks\{PreToolUse, PostToolUse, Notification, Stop, SubagentStop};
$hook = ClaudeHook::create();
if ($hook instanceof PreToolUse) {
$toolName = $hook->toolName(); // e.g., "Bash", "Write", "Edit"
$toolInput = $hook->toolInput(); // Full input array
$filePath = $hook->toolInput('file_path'); // Specific input value
}
if ($hook instanceof PostToolUse) {
$toolResponse = $hook->toolResponse(); // Full response array
$success = $hook->toolResponse('success', true); // With default value
}
if ($hook instanceof Notification) {
$message = $hook->message();
$title = $hook->title();
}
if ($hook instanceof Stop || $hook instanceof SubagentStop) {
$isActive = $hook->stopHookActive();
}All hooks provide a fluent response API:
// Continue processing (default behavior)
$hook->response()->continue();
// Stop Claude from continuing with a reason
$hook->response()->stop('Reason for stopping');
// For PreToolUse: approve or block tool calls
$hook->response()->approve('Optional approval message')->continue();
$hook->response()->block('Required reason for blocking')->continue();
// Suppress output from transcript mode
$hook->response()->suppressOutput()->continue();Automatically format PHP files after edits:
<?php
require 'vendor/autoload.php';
use BeyondCode\ClaudeHooks\ClaudeHook;
use BeyondCode\ClaudeHooks\Hooks\PostToolUse;
$hook = ClaudeHook::create();
$filePath = $hook->toolInput('file_path', '');
if (str_ends_with($filePath, '.php')) {
exec("php-cs-fixer fix $filePath", $output, $exitCode);
if ($exitCode !== 0) {
$hook->response()
->suppressOutput()
->merge(['error' => 'Formatting failed'])
->continue();
}
}Prevent modifications to sensitive files:
#!/usr/bin/env php
<?php
require 'vendor/autoload.php';
use BeyondCode\ClaudeHooks\ClaudeHook;
use BeyondCode\ClaudeHooks\Hooks\PreToolUse;
$hook = ClaudeHook::fromStdin(file_get_contents('php://stdin'));
if ($hook instanceof PreToolUse) {
// Check file-modifying tools
if (in_array($hook->toolName(), ['Write', 'Edit', 'MultiEdit'])) {
$filePath = $hook->toolInput('file_path', '');
$sensitivePatterns = [
'.env',
'config/database.php',
'storage/oauth-private.key',
];
foreach ($sensitivePatterns as $pattern) {
if (str_contains($filePath, $pattern)) {
$hook->response()->block("Cannot modify sensitive file: $filePath");
}
}
}
}
// Allow all other operations
$hook->response()->continue();Custom notification handling:
<?php
require 'vendor/autoload.php';
use BeyondCode\ClaudeHooks\ClaudeHook;
use BeyondCode\ClaudeHooks\Hooks\Notification;
$hook = ClaudeHook::create();
// Send to custom notification system
$notificationData = [
'title' => $hook->title(),
'message' => $hook->message(),
'session' => $hook->sessionId(),
'timestamp' => time()
];
// Send notification to Slack, Discord, etc.
$hook->success();composer testPlease see CHANGELOG for more information on what has changed recently.
Please review our security policy on how to report security vulnerabilities.
The MIT License (MIT). Please see License File for more information.