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run code in 300+ PHP versions simultaneously

@ 2015-08-24T11:40:08Z

<?php

class ValidationException extends \Exception { }

interface Validator
{
    /**
     * @param mixed $data
     * 
     * @throws ValidationException
     */ 
    public function validate($data);
}

class ValidatorComposite 
{
    /**
     * @var Validator[]
     */
    protected $validators;
    
    public function addValidator(Validator $validator)
    {
        $this->validators[] = $validator;
    }
    
    public function validate($data)
    {
        $exceptions = [];
        
        foreach ($this->validators as $validator)
        {
            try
            {
                $validator->validate($data);
            }
            catch (ValidationException $e)
            {
                $exceptions[] = $e->getMessage();
            }
            
            /** Now you have a list of exceptions that were thrown in $exceptions **/
            return $exceptions;
        }
    }
}

class ArrayKeyExistsValidator implements Validator
{
    protected $requiredKeys = [];
    
    public function __construct(array $requiredKeys)
    {
        $this->requiredKeys = $requiredKeys;
    }
    
    public function validate($data)
    {
        if (!is_array($data)) 
        {
            // either try to convert to array or throw exception
        }
        
        foreach ($this->requiredKeys as $requiredKey)
        {
            /** recursively search your array for each key**/
            // I'm doing non recursively here
            if (!array_key_exists($requiredKey, $data))
            {
                throw new ValidationException(
                    sprintf('Key: "%s" not found in array: "%s"', $requiredKey, print_r($data, true))
                );
            }
        }
    }
}

// Object Usage
$composite = new ValidatorComposite;
$validator = new ArrayKeyExistsValidator(array('key1', 'key2'));
$composite->addValidator($validator);

$dataToValidate = array('LOL', 'key1', 'thereIsntAKey2');
$composite->validate($dataToValidate);

Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Output for 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/s4MSY on line 29
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/s4MSY on line 3 Parse error: syntax error, unexpected '[' in /in/s4MSY on line 29
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/s4MSY on line 3 Parse error: parse error, unexpected '[' in /in/s4MSY on line 29
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/s4MSY on line 3 Parse error: syntax error, unexpected T_STRING in /in/s4MSY on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/s4MSY on line 3 Parse error: parse error, unexpected T_STRING in /in/s4MSY on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/s4MSY on line 3 Parse error: parse error in /in/s4MSY on line 5
Process exited with code 255.

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