Hàm parse_ini_string() trong PHP - PHP Function

//lấy về chuỗi ini
$str = file_get_contents('C:xamppphpphp.ini');

$arr = parse_ini_string($str);
echo "<pre>";
	print_r($arr);
echo "</pre>";

Array
(
    [engine] => 1
    [short_open_tag] => 
    [asp_tags] => 
    [precision] => 14
    [output_buffering] => 4096
    [zlib.output_compression] => 
    [implicit_flush] => 
    [unserialize_callback_func] => 
    [serialize_precision] => 17
    [disable_functions] => 
    [disable_classes] => 
    [zend.enable_gc] => 1
    [expose_php] => 1
    [max_execution_time] => 30
    [max_input_time] => 60
    [memory_limit] => 128M
    [error_reporting] => 32767
    [display_errors] => 1
    [display_startup_errors] => 1
    [log_errors] => 1
    [log_errors_max_len] => 1024
    [ignore_repeated_errors] => 
    [ignore_repeated_source] => 
    [report_memleaks] => 1
    [track_errors] => 
    [html_errors] => 1
    [variables_order] => GPCS
    [request_order] => GP
    [register_argc_argv] => 
    [auto_globals_jit] => 1
    [post_max_size] => 8M
    [auto_prepend_file] => 
    [auto_append_file] => 
    [default_mimetype] => text/html
    [default_charset] => UTF-8
    [include_path] => C:xamppphpPEAR
    [doc_root] => 
    [user_dir] => 
    [extension_dir] => C:xamppphpext
    [enable_dl] => 
    [file_uploads] => 1
    [upload_tmp_dir] => C:xampp	mp
    [upload_max_filesize] => 2M
    [max_file_uploads] => 20
    [allow_url_fopen] => 1
    [allow_url_include] => 
    [default_socket_timeout] => 60
    [extension] => php_openssl.dll
    [y2k_compliance] => 1
    [allow_call_time_pass_reference] => 
    [safe_mode] => 
    [safe_mode_gid] => 
    [safe_mode_allowed_env_vars] => PHP_
    [safe_mode_protected_env_vars] => LD_LIBRARY_PATH
    [error_log] => C:xamppphplogsphp_error_log
    [register_globals] => 
    [register_long_arrays] => 
    [magic_quotes_gpc] => 
    [magic_quotes_runtime] => 
    [magic_quotes_sybase] => 
    [cli_server.color] => 1
    [pdo_mysql.default_socket] => 
    [pdo_mysql.cache_size] => 2000
    [SMTP] => localhost
    [smtp_port] => 25
    [sendmail_path] => "C:xamppsendmailsendmail.exe" -t
    [mail.add_x_header] => 1
    [sql.safe_mode] => 
    [odbc.allow_persistent] => 1
    [odbc.check_persistent] => 1
    [odbc.max_persistent] => -1
    [odbc.max_links] => -1
    [odbc.defaultlrl] => 4096
    [odbc.defaultbinmode] => 1
    [ibase.allow_persistent] => 1
    [ibase.max_persistent] => -1
    [ibase.max_links] => -1
    [ibase.timestampformat] => %Y-%m-%d %H:%M:%S
    [ibase.dateformat] => %Y-%m-%d
    [ibase.timeformat] => %H:%M:%S
    [mysql.allow_local_infile] => 1
    [mysql.allow_persistent] => 1
    [mysql.cache_size] => 2000
    [mysql.max_persistent] => -1
    [mysql.max_links] => -1
    [mysql.default_port] => 3306
    [mysql.default_socket] => MySQL
    [mysql.default_host] => 
    [mysql.default_user] => 
    [mysql.default_password] => 
    [mysql.connect_timeout] => 3
    [mysql.trace_mode] => 
    [mysqli.max_persistent] => -1
    [mysqli.allow_persistent] => 1
    [mysqli.max_links] => -1
    [mysqli.cache_size] => 2000
    [mysqli.default_port] => 3306
    [mysqli.default_socket] => 
    [mysqli.default_host] => 
    [mysqli.default_user] => 
    [mysqli.default_pw] => 
    [mysqli.reconnect] => 
    [mysqlnd.collect_statistics] => 1
    [mysqlnd.collect_memory_statistics] => 1
    [pgsql.allow_persistent] => 1
    [pgsql.auto_reset_persistent] => 
    [pgsql.max_persistent] => -1
    [pgsql.max_links] => -1
    [pgsql.ignore_notice] => 0
    [pgsql.log_notice] => 0
    [sybct.allow_persistent] => 1
    [sybct.max_persistent] => -1
    [sybct.max_links] => -1
    [sybct.min_server_severity] => 10
    [sybct.min_client_severity] => 10
    [bcmath.scale] => 0
    [browscap] => C:xamppphpextrasrowscap.ini
    [session.save_handler] => files
    [session.save_path] => C:xampp	mp
    [session.use_strict_mode] => 0
    [session.use_cookies] => 1
    [session.use_only_cookies] => 1
    [session.name] => PHPSESSID
    [session.auto_start] => 0
    [session.cookie_lifetime] => 0
    [session.cookie_path] => /
    [session.cookie_domain] => 
    [session.cookie_httponly] => 
    [session.serialize_handler] => php
    [session.gc_probability] => 1
    [session.gc_divisor] => 1000
    [session.gc_maxlifetime] => 1440
    [session.referer_check] => 
    [session.entropy_length] => 0
    [session.cache_limiter] => nocache
    [session.cache_expire] => 180
    [session.use_trans_sid] => 0
    [session.hash_function] => 0
    [session.hash_bits_per_character] => 5
    [url_rewriter.tags] => a=href,area=href,frame=src,input=src,form=fakeentry
    [mssql.allow_persistent] => 1
    [mssql.max_persistent] => -1
    [mssql.max_links] => -1
    [mssql.min_error_severity] => 10
    [mssql.min_message_severity] => 10
    [mssql.compatibility_mode] => 
    [mssql.secure_connection] => 
    [tidy.clean_output] => 
    [soap.wsdl_cache_enabled] => 1
    [soap.wsdl_cache_dir] => /tmp
    [soap.wsdl_cache_ttl] => 86400
    [soap.wsdl_cache_limit] => 5
    [ldap.max_links] => -1
    [define_syslog_variables] => 
    [date.timezone] => Europe/Berlin
    [mysql.max_link] => -1
    [mssql.compatability_mode] => 
)