javascript - Security of writing/retrieving data from JS through PHP -


i have web app lets users make todo-lists, save them server , retrieve them id (no login/user session, id, if guess id...).

  1. the id passed jquery php via post.
  2. if id correct , not password-protected, php echoes data jquery.
  3. new items saved post jquery php.

no database. every list sits in own file, {id}.txt. front-end code used render webpage, ractive.js, escapes html characters.

i'm checking no fields jquery php , sent id in format i've chosen. location of {id}.txt's not accessible outside.

is safe? i'm new php security. have no idea if there's simple thing cannot see. i'm guessing should fine since data stored in txt files , checked validity.

do need sanitize inputs in way? cannot find real reason it. php checks valid ids using file_exists(). ok?

thank lot. ask other details if needed.


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