Save PHP variables to a text file

Question

I was wondering how to save PHP variables to a txt file and then retrieve them again   Example   There is an input box  after submitted the stuff that was written in the input box will be saved to a text file  Later on the results need to be brought back as a variable  So lets say the variable is  text I need that to be saved to a text file and be able to retrieve it back again

User · Accepted Answer

This should do what you want  but without more context I can t tell for sure   Writing  text to a file    text    Anything    var str   var export  text  true    var     lt  php n n  text    var str  n n  gt    file put contents  filename php    var     Retrieving it again   include  filename php   echo  text

User · Answer

for example  you have anyFile php  and  there is written  any variable  hi Frank    to change that variable to hi Jack  use like the following code    lt  php  content   file get contents  anyFile php       new content   preg replace     any variable                 any variable  hi Jack      content    file put contents  anyFile php    new content     gt

User · Answer

Okay  so I needed a solution to this  and I borrowed heavily from the answers to this question and made a library  https   github com rahuldottech varDx  Licensed under the MIT license    It uses serialize   and unserialize   and writes data to a file  It can read and write multiple objects variables whatever to and from the same file   Usage    lt  php require  varDx php    dx   new  varDx cDX    create an object  dx- gt def  file dat      define data file  val1    this is a string    dx- gt write  data1    val1     writes key to file echo  dx- gt read  data1      returns key value from file   See the github page for more information  It has functions to read  write  check  modify and delete data

User · Answer

Use a combination of of fopen  fwrite and fread  PHP net has excellent documentation and examples of each of them     http   us2 php net manual en function fopen php http   us2 php net manual en function fwrite php http   us2 php net manual en function fread php

User · Answer

Personally  I d use file put contents and file get contents  these are wrappers for fopen  fputs  etc    Also  if you are going to write any structured data  such as arrays  I suggest you serialize and unserialize the files contents    file     tmp file    content   serialize  my variable   file put contents  file   content    content   unserialize file get contents  file

User · Answer

Sorry I can t comment just yet  otherwise I would   To add to Christian s answer you might consider using json encode and json decode instead of serialize and unserialize to keep you safe  See a warning from the PHP man page      Warning      Do not pass untrusted user input to unserialize    Unserialization can result in code being loaded and executed due to object instantiation and autoloading  and a malicious user may be able to exploit this  Use a safe  standard data interchange format such as JSON  via json decode   and json encode    if you need to pass serialized data to the user    So your final solution might have the following    file     tmp file    content   json encode  my variable   file put contents  file   content    content   json decode file get contents  file   TRUE

User · Answer

Use serialize   on the variable  then save the string to a file  later you will be able to read the serialed var from the file and rebuilt the original var  wether it was a string or an array or an object

[php] Save PHP variables to a text file

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