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편집 파일: Env.php

<?php
namespace JmesPath;

/**
 * Provides a simple environment based search.
 *
 * The runtime utilized by the Env class can be customized via environment
 * variables. If the JP_PHP_COMPILE environment variable is specified, then the
 * CompilerRuntime will be utilized. If set to "on", JMESPath expressions will
 * be cached to the system's temp directory. Set the environment variable to
 * a string to cache expressions to a specific directory.
 */
final class Env
{
    const COMPILE_DIR = 'JP_PHP_COMPILE';

/**
     * Returns data from the input array that matches a JMESPath expression.
     *
     * @param string $expression JMESPath expression to evaluate
     * @param mixed  $data       JSON-like data to search
     *
     * @return mixed Returns the matching data or null
     */
    public static function search($expression, $data)
    {
        static $runtime;

if (!$runtime) {
            $runtime = Env::createRuntime();
        }

return $runtime($expression, $data);
    }

/**
     * Creates a JMESPath runtime based on environment variables and extensions
     * available on a system.
     *
     * @return callable
     */
    public static function createRuntime()
    {
        switch ($compileDir = self::getEnvVariable(self::COMPILE_DIR)) {
            case false: return new AstRuntime();
            case 'on': return new CompilerRuntime();
            default: return new CompilerRuntime($compileDir);
        }
    }

/**
     * Delete all previously compiled JMESPath files from the JP_COMPILE_DIR
     * directory or sys_get_temp_dir().
     *
     * @return int Returns the number of deleted files.
     */
    public static function cleanCompileDir()
    {
        $total = 0;
        $compileDir = self::getEnvVariable(self::COMPILE_DIR) ?: sys_get_temp_dir();

foreach (glob("{$compileDir}/jmespath_*.php") as $file) {
            $total++;
            unlink($file);
        }

return $total;
    }

/**
     * Reads an environment variable from $_SERVER, $_ENV or via getenv().
     *
     * @param string $name
     *
     * @return string|null
     */
    private static function getEnvVariable($name)
    {
        if (array_key_exists($name, $_SERVER)) {
            return $_SERVER[$name];
        }

if (array_key_exists($name, $_ENV)) {
            return $_ENV[$name];
        }

$value = getenv($name);

return $value === false ? null : $value;
    }
}

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편집 파일: Env.php

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