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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Config\Writer;
use Zend\Config\Exception;
class PhpArray extends AbstractWriter
{
/**
* @var string
*/
const INDENT_STRING = ' ';
/**
* @var bool
*/
protected $useBracketArraySyntax = false;
/**
* @var bool
*/
protected $useClassNameScalars = false;
/**
* processConfig(): defined by AbstractWriter.
*
* @param array $config
* @return string
*/
public function processConfig(array $config)
{
$arraySyntax = [
'open' => $this->useBracketArraySyntax ? '[' : 'array(',
'close' => $this->useBracketArraySyntax ? ']' : ')'
];
return "<?php\n" .
"return " . $arraySyntax['open'] . "\n" . $this->processIndented($config, $arraySyntax) .
$arraySyntax['close'] . ";\n";
}
/**
* Sets whether or not to use the PHP 5.4+ "[]" array syntax.
*
* @param bool $value
* @return self
*/
public function setUseBracketArraySyntax($value)
{
$this->useBracketArraySyntax = $value;
return $this;
}
/**
* Sets whether or not to render resolvable FQN strings as scalars, using PHP 5.5+ class-keyword
*
* @param boolean $value
* @return self
*/
public function setUseClassNameScalars($value)
{
$this->useClassNameScalars = $value;
return $this;
}
/**
* @return boolean
*/
public function getUseClassNameScalars()
{
return $this->useClassNameScalars;
}
/**
* toFile(): defined by Writer interface.
*
* @see WriterInterface::toFile()
* @param string $filename
* @param mixed $config
* @param bool $exclusiveLock
* @return void
* @throws Exception\InvalidArgumentException
* @throws Exception\RuntimeException
*/
public function toFile($filename, $config, $exclusiveLock = true)
{
if (empty($filename)) {
throw new Exception\InvalidArgumentException('No file name specified');
}
$flags = 0;
if ($exclusiveLock) {
$flags |= LOCK_EX;
}
set_error_handler(
function ($error, $message = '') use ($filename) {
throw new Exception\RuntimeException(
sprintf('Error writing to "%s": %s', $filename, $message),
$error
);
},
E_WARNING
);
try {
// for Windows, paths are escaped.
$dirname = str_replace('\\', '\\\\', dirname($filename));
$string = $this->toString($config);
$string = str_replace("'" . $dirname, "__DIR__ . '", $string);
file_put_contents($filename, $string, $flags);
} catch (\Exception $e) {
restore_error_handler();
throw $e;
}
restore_error_handler();
}
/**
* Recursively processes a PHP config array structure into a readable format.
*
* @param array $config
* @param array $arraySyntax
* @param int $indentLevel
* @return string
*/
protected function processIndented(array $config, array $arraySyntax, &$indentLevel = 1)
{
$arrayString = "";
foreach ($config as $key => $value) {
$arrayString .= str_repeat(self::INDENT_STRING, $indentLevel);
$arrayString .= (is_int($key) ? $key : $this->processStringKey($key)) . ' => ';
if (is_array($value)) {
if ($value === []) {
$arrayString .= $arraySyntax['open'] . $arraySyntax['close'] . ",\n";
} else {
$indentLevel++;
$arrayString .= $arraySyntax['open'] . "\n"
. $this->processIndented($value, $arraySyntax, $indentLevel)
. str_repeat(self::INDENT_STRING, --$indentLevel) . $arraySyntax['close'] . ",\n";
}
} elseif (is_object($value)) {
$arrayString .= var_export($value, true) . ",\n";
} elseif (is_string($value)) {
$arrayString .= $this->processStringValue($value) . ",\n";
} elseif (is_bool($value)) {
$arrayString .= ($value ? 'true' : 'false') . ",\n";
} elseif ($value === null) {
$arrayString .= "null,\n";
} else {
$arrayString .= $value . ",\n";
}
}
return $arrayString;
}
/**
* Process a string configuration value
*
* @param string $value
* @return string
*/
protected function processStringValue($value)
{
if ($this->useClassNameScalars && false !== ($fqnValue = $this->fqnStringToClassNameScalar($value))) {
return $fqnValue;
}
return var_export($value, true);
}
/**
* Process a string configuration key
*
* @param string $key
* @return string
*/
protected function processStringKey($key)
{
if ($this->useClassNameScalars && false !== ($fqnKey = $this->fqnStringToClassNameScalar($key))) {
return $fqnKey;
}
return "'" . addslashes($key) . "'";
}
/**
* Attempts to convert a FQN string to class name scalar.
* Returns false if string is not a valid FQN or can not be resolved to an existing name.
*
* @param string $string
* @return bool|string
*/
protected function fqnStringToClassNameScalar($string)
{
if (strlen($string) < 1) {
return false;
}
if ($string[0] !== '\\') {
$string = '\\' . $string;
}
if ($this->checkStringIsFqn($string)) {
return $string . '::class';
}
return false;
}
/**
* Check whether a string represents a resolvable FQCN
*
* @param string $string
* @return bool
*/
protected function checkStringIsFqn($string)
{
if (!preg_match('/^(?:\x5c[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)+$/', $string)) {
return false;
}
return class_exists($string) || interface_exists($string) || trait_exists($string);
}
}