Paste or type your PHP code to validate syntax
PHP Validator
How It Works
- Step 1: Paste PHP code including functions, classes, control structures, and variable declarations with proper PHP tags () for syntax validation.
- Step 2: The validator parses PHP syntax checking for missing semicolons, unmatched brackets/parentheses, undefined variables, incorrect function signatures, and PSR-12 coding standard violations.
- Step 3: Identifies syntax errors with line numbers and error descriptions (e.g., "Unexpected '}' on line 15", "Missing semicolon after statement on line 8").
- Step 4: Provides validation report with error count, warnings for deprecated functions (mysql_*, each()), and suggestions for code improvements following PHP best practices.
Manual vs Automated PHP Validation
| Feature | Manual Testing | AI-Powered Validator |
|---|---|---|
| Error Detection | Run PHP file on server to find errors | Instant syntax validation before deployment |
| Feedback Speed | Wait for server execution and error logs | Real-time validation as you type |
| Security | Risk of running malformed code on server | Safe client-side validation, no execution |
| PSR Standards | Manual code review for PSR compliance | Automatic PSR-12 standard checking |
| Deprecated Functions | Miss deprecated functions until runtime | Warns about mysql_*, each(), and deprecated APIs |
| Complex Code | Hard to debug namespaces and traits | Validates classes, namespaces, and traits |
PHP Validation Examples
Example: PHP Syntax Validation
<?php
function calculateTotal($items) {
$total = 0
foreach ($items as $item) {
$total += $item['price']
}
return $total
}
class User {
public $name;
public function __construct($name {
$this->name = $name;
}
public function greet() {
echo "Hello, " . $this->name
}
}Validation Report:
❌ ERRORS (5):
Line 3: Missing semicolon after statement
$total = 0
^ Expected ';'
Line 5: Missing semicolon after statement
$total += $item['price']
^ Expected ';'
Line 7: Missing semicolon after statement
return $total
^ Expected ';'
Line 13: Syntax error in function signature
public function __construct($name {
^ Expected ')'
Line 19: Missing semicolon after statement
echo "Hello, " . $this->name
^ Expected ';'
⚠️ WARNINGS (1):
Line 4: Consider using array_sum() for better performance
foreach ($items as $item) { $total += $item['price']; }
Suggestion: $total = array_sum(array_column($items, 'price'));
✅ VALID CODE (After Fixes):
<?php
function calculateTotal($items) {
$total = 0;
foreach ($items as $item) {
$total += $item['price'];
}
return $total;
}
class User {
public $name;
public function __construct($name) {
$this->name = $name;
}
public function greet() {
echo "Hello, " . $this->name;
}
}
Summary:
Total Errors: 5 (syntax errors)
Total Warnings: 1 (optimization suggestion)
PSR-12 Compliance: 100% (after fixes)Key Changes:
The validator identifies critical syntax errors that would cause PHP fatal errors at runtime. Missing semicolons after statements (lines 3, 5, 7, 19) are the most common PHP syntax errors—PHP requires semicolons as statement terminators unlike languages like Python or JavaScript (with ASI). The validator detects the malformed constructor signature on line 13 where the closing parenthesis is missing before the opening brace. This would trigger 'Parse error: syntax error, unexpected '{'' in PHP. The validator also provides optimization warnings—suggesting array_sum(array_column()) instead of manual foreach loop for better performance and readability. After fixes, the code follows PSR-12 coding standards with proper indentation, spacing, and bracket placement. The validator catches errors before deployment, preventing production crashes. PHP developers use validators to check code before committing, validate third-party code snippets, and enforce coding standards in CI/CD pipelines. The client-side validation ensures code privacy—no PHP code is sent to servers, critical for proprietary business logic or sensitive algorithms.
Frequently Asked Questions
How does the PHP validator work?
Our PHP validator uses client-side parsing to check PHP syntax, validate code structure, detect common errors, and verify PHP code formatting. It checks for syntax errors, missing brackets, incorrect function calls, and other common PHP issues.
What PHP versions does the validator support?
The validator checks for general PHP syntax that works across PHP versions. It validates basic PHP syntax including variables, functions, classes, control structures, and common PHP constructs. However, it may not catch all version-specific features or advanced syntax.
Is my PHP code safe when using this validator?
Yes, completely safe. All validation happens entirely in your browser using client-side JavaScript. Your PHP code never leaves your device, is never sent to any server, and is never stored or logged anywhere.
Can the validator execute PHP code?
No, this validator only checks PHP syntax and structure. It does not execute PHP code or connect to servers. It validates the format and syntax of PHP code, not its execution results or functionality.
What types of errors does the validator detect?
The validator detects syntax errors, missing brackets/parentheses, incorrect function calls, unclosed strings, missing semicolons, and common PHP formatting issues. It provides helpful error messages to guide you in fixing PHP syntax problems.
Can I validate complex PHP code?
Yes, the validator can handle complex PHP code including classes, namespaces, traits, and advanced PHP features. However, very complex code with database connections or external dependencies may have limited validation support.