PHP 中 $result = {"list":[{"fs_id":2304835489,"path":"\/apps\/docs\/manage.py","ctime":1364714104,"mtime":1364725970,"md5":"0a7daa8c1d164a350c0ebcfa24edb973","size":249,"isdir":0},{"fs_id":1352679689,"path":"\/apps\/docs\/shoe_out.php","ctime":1364743690,"mtime":1364743721,"md5":"72a5654e779580114bfbfc1679cbbcc4","size":1710,"isdir":0},{"fs_id":346659354,"path":"\/apps\/docs\/common.php","ctime":1364743634,"mtime":1364743721,"md5":"cf36a6e6f7e13b842dfe8b10e5b3ada1","size":16290,"isdir":0},{"fs_id":2755607330,"path":"\/apps\/docs\/shoe_in.php","ctime":1364743688,"mtime":1364743721,"md5":"f76b1a08fade9fac9f85c242112396a5","size":1707,"isdir":0},{"fs_id":4101030701,"path":"\/apps\/docs\/create_db.php","ctime":1364743676,"mtime":1364743721,"md5":"866bfe6b41258c7bae824db81d1294ca","size":2457,"isdir":0},{"fs_id":1210812980,"path":"\/apps\/docs\/index.php","ctime":1364743678,"mtime":1364743721,"md5":"9f4f5eab685fc3341fafa82ad3fdba91","size":493,"isdir":0},{"fs_id":2639650643,"path":"\/apps\/docs\/manage.php","ctime":1364743686,"mtime":1364743721,"md5":"26fa466425011f30d273be5d85199e4f","size":227,"isdir":0},{"fs_id":4107927200,"path":"\/apps\/docs\/inquire.php","ctime":1364743681,"mtime":1364743721,"md5":"33556cae9f3ed7ca1f2d6f4b34ffabbc","size":358,"isdir":0},{"fs_id":3083472086,"path":"\/apps\/docs\/add.php","ctime":1364743621,"mtime":1364743721,"md5":"fde12c2c82802a6cbb5f95de2e314309","size":2816,"isdir":0}],"request_id":3070568886}
是以字符串的形式的，怎样以字典的形式提取元素？
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FROM 114.93.57.*