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Edit File : Loader.php \| Size : 9.41 KB
<?php namespace Dotenv; use Dotenv\Exception\InvalidPathException; /** * This is the loaded class. * * It's responsible for loading variables by reading a file from disk and: * - stripping comments beginning with a `#`, * - parsing lines that look shell variable setters, e.g `export key = value`, `key="value"`. / class Loader { /* * The file path. * * @var string / protected $filePath; /* * Are we immutable? * * @var bool / protected $immutable; /* * The list of environment variables declared inside the 'env' file. * * @var array / public $variableNames = array(); /* * Create a new loader instance. * * @param string $filePath * @param bool $immutable * * @return void / public function __construct($filePath, $immutable = false) { $this->filePath = $filePath; $this->immutable = $immutable; } /* * Set immutable value. * * @param bool $immutable * @return $this / public function setImmutable($immutable = false) { $this->immutable = $immutable; return $this; } /* * Get immutable value. * * @return bool / public function getImmutable() { return $this->immutable; } /* * Load `.env` file in given directory. * * @throws \Dotenv\Exception\InvalidPathException\|\Dotenv\Exception\InvalidFileException * * @return array / public function load() { $this->ensureFileIsReadable(); $filePath = $this->filePath; $lines = $this->readLinesFromFile($filePath); foreach ($lines as $line) { if (!$this->isComment($line) && $this->looksLikeSetter($line)) { $this->setEnvironmentVariable($line); } } return $lines; } /* * Ensures the given filePath is readable. * * @throws \Dotenv\Exception\InvalidPathException * * @return void / protected function ensureFileIsReadable() { if (!is_readable($this->filePath) \|\| !is_file($this->filePath)) { throw new InvalidPathException(sprintf('Unable to read the environment file at %s.', $this->filePath)); } } /* * Normalise the given environment variable. * * Takes value as passed in by developer and: * - ensures we're dealing with a separate name and value, breaking apart the name string if needed, * - cleaning the value of quotes, * - cleaning the name of quotes, * - resolving nested variables. * * @param string $name * @param string $value * * @throws \Dotenv\Exception\InvalidFileException * * @return array / protected function normaliseEnvironmentVariable($name, $value) { list($name, $value) = $this->processFilters($name, $value); $value = $this->resolveNestedVariables($value); return array($name, $value); } /* * Process the runtime filters. * * Called from `normaliseEnvironmentVariable` and the `VariableFactory`, passed as a callback in `$this->loadFromFile()`. * * @param string $name * @param string $value * * @throws \Dotenv\Exception\InvalidFileException * * @return array / public function processFilters($name, $value) { list($name, $value) = $this->splitCompoundStringIntoParts($name, $value); list($name, $value) = $this->sanitiseVariableName($name, $value); list($name, $value) = $this->sanitiseVariableValue($name, $value); return array($name, $value); } /* * Read lines from the file, auto detecting line endings. * * @param string $filePath * * @return array / protected function readLinesFromFile($filePath) { // Read file into an array of lines with auto-detected line endings $autodetect = ini_get('auto_detect_line_endings'); ini_set('auto_detect_line_endings', '1'); $lines = file($filePath, FILE_IGNORE_NEW_LINES \| FILE_SKIP_EMPTY_LINES); ini_set('auto_detect_line_endings', $autodetect); return $lines; } /* * Determine if the line in the file is a comment, e.g. begins with a #. * * @param string $line * * @return bool / protected function isComment($line) { $line = ltrim($line); return isset($line[0]) && $line[0] === '#'; } /* * Determine if the given line looks like it's setting a variable. * * @param string $line * * @return bool / protected function looksLikeSetter($line) { return strpos($line, '=') !== false; } /* * Split the compound string into parts. * * If the `$name` contains an `=` sign, then we split it into 2 parts, a `name` & `value` * disregarding the `$value` passed in. * * @param string $name * @param string $value * * @return array / protected function splitCompoundStringIntoParts($name, $value) { if (strpos($name, '=') !== false) { list($name, $value) = array_map('trim', explode('=', $name, 2)); } return array($name, $value); } /* * Strips quotes from the environment variable value. * * @param string $name * @param string $value * * @throws \Dotenv\Exception\InvalidFileException * * @return array / protected function sanitiseVariableValue($name, $value) { $value = trim($value); if (!$value) { return array($name, $value); } return array($name, Parser::parseValue($value)); } /* * Resolve the nested variables. * * Look for ${varname} patterns in the variable value and replace with an * existing environment variable. * * @param string $value * * @return mixed / protected function resolveNestedVariables($value) { if (strpos($value, '$') !== false) { $loader = $this; $value = preg_replace_callback( '/\${([a-zA-Z0-9_.]+)}/', function ($matchedPatterns) use ($loader) { $nestedVariable = $loader->getEnvironmentVariable($matchedPatterns[1]); if ($nestedVariable === null) { return $matchedPatterns[0]; } else { return $nestedVariable; } }, $value ); } return $value; } /* * Strips quotes and the optional leading "export " from the environment variable name. * * @param string $name * @param string $value * * @return array / protected function sanitiseVariableName($name, $value) { return array(Parser::parseName($name), $value); } /* * Search the different places for environment variables and return first value found. * * @param string $name * * @return string\|null / public function getEnvironmentVariable($name) { switch (true) { case array_key_exists($name, $_ENV): return $_ENV[$name]; case array_key_exists($name, $_SERVER): return $_SERVER[$name]; default: $value = getenv($name); return $value === false ? null : $value; // switch getenv default to null } } /* * Set an environment variable. * * This is done using: * - putenv, * - $_ENV, * - $_SERVER. * * The environment variable value is stripped of single and double quotes. * * @param string $name * @param string\|null $value * * @throws \Dotenv\Exception\InvalidFileException * * @return void / public function setEnvironmentVariable($name, $value = null) { list($name, $value) = $this->normaliseEnvironmentVariable($name, $value); $this->variableNames[] = $name; // Don't overwrite existing environment variables if we're immutable // Ruby's dotenv does this with `ENV[key] \|\|= value`. if ($this->immutable && $this->getEnvironmentVariable($name) !== null) { return; } // If PHP is running as an Apache module and an existing // Apache environment variable exists, overwrite it if (function_exists('apache_getenv') && function_exists('apache_setenv') && apache_getenv($name) !== false) { apache_setenv($name, $value); } if (function_exists('putenv')) { putenv("$name=$value"); } $_ENV[$name] = $value; $_SERVER[$name] = $value; } /* * Clear an environment variable. * * This is not (currently) used by Dotenv but is provided as a utility * method for 3rd party code. * * This is done using: * - putenv, * - unset($_ENV, $_SERVER). * * @param string $name * * @see setEnvironmentVariable() * * @return void */ public function clearEnvironmentVariable($name) { // Don't clear anything if we're immutable. if ($this->immutable) { return; } if (function_exists('putenv')) { putenv($name); } unset($_ENV[$name], $_SERVER[$name]); } } Back

Edit File : Loader.php | Size : 9.41 KB

<?php

namespace Dotenv;

use Dotenv\Exception\InvalidPathException;

/**
 * This is the loaded class.
 *
 * It's responsible for loading variables by reading a file from disk and:
 * - stripping comments beginning with a `#`,
 * - parsing lines that look shell variable setters, e.g `export key = value`, `key="value"`.
 */
class Loader
{
    /**
     * The file path.
     *
     * @var string
     */
    protected $filePath;

/**
     * Are we immutable?
     *
     * @var bool
     */
    protected $immutable;

/**
     * The list of environment variables declared inside the 'env' file.
     *
     * @var array
     */
    public $variableNames = array();

/**
     * Create a new loader instance.
     *
     * @param string $filePath
     * @param bool   $immutable
     *
     * @return void
     */
    public function __construct($filePath, $immutable = false)
    {
        $this->filePath = $filePath;
        $this->immutable = $immutable;
    }

/**
     * Set immutable value.
     *
     * @param bool $immutable
     * @return $this
     */
    public function setImmutable($immutable = false)
    {
        $this->immutable = $immutable;

return $this;
    }

/**
     * Get immutable value.
     *
     * @return bool
     */
    public function getImmutable()
    {
        return $this->immutable;
    }

/**
     * Load `.env` file in given directory.
     *
     * @throws \Dotenv\Exception\InvalidPathException|\Dotenv\Exception\InvalidFileException
     *
     * @return array
     */
    public function load()
    {
        $this->ensureFileIsReadable();

$filePath = $this->filePath;
        $lines = $this->readLinesFromFile($filePath);
        foreach ($lines as $line) {
            if (!$this->isComment($line) && $this->looksLikeSetter($line)) {
                $this->setEnvironmentVariable($line);
            }
        }

return $lines;
    }

/**
     * Ensures the given filePath is readable.
     *
     * @throws \Dotenv\Exception\InvalidPathException
     *
     * @return void
     */
    protected function ensureFileIsReadable()
    {
        if (!is_readable($this->filePath) || !is_file($this->filePath)) {
            throw new InvalidPathException(sprintf('Unable to read the environment file at %s.', $this->filePath));
        }
    }

/**
     * Normalise the given environment variable.
     *
     * Takes value as passed in by developer and:
     * - ensures we're dealing with a separate name and value, breaking apart the name string if needed,
     * - cleaning the value of quotes,
     * - cleaning the name of quotes,
     * - resolving nested variables.
     *
     * @param string $name
     * @param string $value
     *
     * @throws \Dotenv\Exception\InvalidFileException
     *
     * @return array
     */
    protected function normaliseEnvironmentVariable($name, $value)
    {
        list($name, $value) = $this->processFilters($name, $value);

$value = $this->resolveNestedVariables($value);

return array($name, $value);
    }

/**
     * Process the runtime filters.
     *
     * Called from `normaliseEnvironmentVariable` and the `VariableFactory`, passed as a callback in `$this->loadFromFile()`.
     *
     * @param string $name
     * @param string $value
     *
     * @throws \Dotenv\Exception\InvalidFileException
     *
     * @return array
     */
    public function processFilters($name, $value)
    {
        list($name, $value) = $this->splitCompoundStringIntoParts($name, $value);
        list($name, $value) = $this->sanitiseVariableName($name, $value);
        list($name, $value) = $this->sanitiseVariableValue($name, $value);

return array($name, $value);
    }

/**
     * Read lines from the file, auto detecting line endings.
     *
     * @param string $filePath
     *
     * @return array
     */
    protected function readLinesFromFile($filePath)
    {
        // Read file into an array of lines with auto-detected line endings
        $autodetect = ini_get('auto_detect_line_endings');
        ini_set('auto_detect_line_endings', '1');
        $lines = file($filePath, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
        ini_set('auto_detect_line_endings', $autodetect);

return $lines;
    }

/**
     * Determine if the line in the file is a comment, e.g. begins with a #.
     *
     * @param string $line
     *
     * @return bool
     */
    protected function isComment($line)
    {
        $line = ltrim($line);

return isset($line[0]) && $line[0] === '#';
    }

/**
     * Determine if the given line looks like it's setting a variable.
     *
     * @param string $line
     *
     * @return bool
     */
    protected function looksLikeSetter($line)
    {
        return strpos($line, '=') !== false;
    }

/**
     * Split the compound string into parts.
     *
     * If the `$name` contains an `=` sign, then we split it into 2 parts, a `name` & `value`
     * disregarding the `$value` passed in.
     *
     * @param string $name
     * @param string $value
     *
     * @return array
     */
    protected function splitCompoundStringIntoParts($name, $value)
    {
        if (strpos($name, '=') !== false) {
            list($name, $value) = array_map('trim', explode('=', $name, 2));
        }

return array($name, $value);
    }

/**
     * Strips quotes from the environment variable value.
     *
     * @param string $name
     * @param string $value
     *
     * @throws \Dotenv\Exception\InvalidFileException
     *
     * @return array
     */
    protected function sanitiseVariableValue($name, $value)
    {
        $value = trim($value);
        if (!$value) {
            return array($name, $value);
        }

return array($name, Parser::parseValue($value));
    }

/**
     * Resolve the nested variables.
     *
     * Look for ${varname} patterns in the variable value and replace with an
     * existing environment variable.
     *
     * @param string $value
     *
     * @return mixed
     */
    protected function resolveNestedVariables($value)
    {
        if (strpos($value, '$') !== false) {
            $loader = $this;
            $value = preg_replace_callback(
                '/\${([a-zA-Z0-9_.]+)}/',
                function ($matchedPatterns) use ($loader) {
                    $nestedVariable = $loader->getEnvironmentVariable($matchedPatterns[1]);
                    if ($nestedVariable === null) {
                        return $matchedPatterns[0];
                    } else {
                        return $nestedVariable;
                    }
                },
                $value
            );
        }

return $value;
    }

/**
     * Strips quotes and the optional leading "export " from the environment variable name.
     *
     * @param string $name
     * @param string $value
     *
     * @return array
     */
    protected function sanitiseVariableName($name, $value)
    {
        return array(Parser::parseName($name), $value);
    }

/**
     * Search the different places for environment variables and return first value found.
     *
     * @param string $name
     *
     * @return string|null
     */
    public function getEnvironmentVariable($name)
    {
        switch (true) {
            case array_key_exists($name, $_ENV):
                return $_ENV[$name];
            case array_key_exists($name, $_SERVER):
                return $_SERVER[$name];
            default:
                $value = getenv($name);
                return $value === false ? null : $value; // switch getenv default to null
        }
    }

/**
     * Set an environment variable.
     *
     * This is done using:
     * - putenv,
     * - $_ENV,
     * - $_SERVER.
     *
     * The environment variable value is stripped of single and double quotes.
     *
     * @param string      $name
     * @param string|null $value
     *
     * @throws \Dotenv\Exception\InvalidFileException
     *
     * @return void
     */
    public function setEnvironmentVariable($name, $value = null)
    {
        list($name, $value) = $this->normaliseEnvironmentVariable($name, $value);

$this->variableNames[] = $name;

// Don't overwrite existing environment variables if we're immutable
        // Ruby's dotenv does this with `ENV[key] ||= value`.
        if ($this->immutable && $this->getEnvironmentVariable($name) !== null) {
            return;
        }

// If PHP is running as an Apache module and an existing
        // Apache environment variable exists, overwrite it
        if (function_exists('apache_getenv') && function_exists('apache_setenv') && apache_getenv($name) !== false) {
            apache_setenv($name, $value);
        }

if (function_exists('putenv')) {
            putenv("$name=$value");
        }

$_ENV[$name] = $value;
        $_SERVER[$name] = $value;
    }

/**
     * Clear an environment variable.
     *
     * This is not (currently) used by Dotenv but is provided as a utility
     * method for 3rd party code.
     *
     * This is done using:
     * - putenv,
     * - unset($_ENV, $_SERVER).
     *
     * @param string $name
     *
     * @see setEnvironmentVariable()
     *
     * @return void
     */
    public function clearEnvironmentVariable($name)
    {
        // Don't clear anything if we're immutable.
        if ($this->immutable) {
            return;
        }

if (function_exists('putenv')) {
            putenv($name);
        }

unset($_ENV[$name], $_SERVER[$name]);
    }
}

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