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04.24.2008 at 08:10AM PDT, ID: 23350535
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8.6

PHP Forum style text saving (addslashes/stripslashes/mysql_real_escape_string)

Asked by JackyKLL in PHP Scripting Language, Regular Expressions, WebApplications

Tags:

Okay... I got a code that required me to save text (come from textarea or text input via HTML form method POST) into files as php format. And I am required to load it back into my php code when needed.

Steps of the flow (saving):
1. Users type something into text area and send it to server
2. Server load the existing message (if there is one) and append the new message into array and store it (format as provided in Code Snippet)

My current setting:
1. Let php magic quote on (automatically addslashes applied)
2. stripslashes from $_POST/$_GET and apply mysql_real_escape_string

Current problems in my application:
if I have one message like a\'" (a slash singleQuote doubleQuote) the magic quote created this string a\\\'\", but everytime i load this into my php code the slashes infront of single quote will decreasing and the slash infront of double quote remain unchange. After 3 message saved (loaded the first message twice and saved twice) the inputed slash infront of single quote disappear, also the single quote terminated the string and crashed the code (array('a'\"', 'asda', 'asda', )).
e.g.  a\\\'\"' -> a\'\"' -> a'\"'

if I apply additional addslashes. the slash infront of my single quote will not disappear, but the slash for before double quotewill keep increasing
e.g. 'a\\\'\\\"' -> 'a\\\'\\\\\\\"' -> 'a\\\'\\\\\\\\\\\\\\\"'

if I used stripslashes on it, it can remove the additional slash infront of double quote but it also removed my input slash (the one infront of single quote)

Solution:
Either general method that forum use for saving text (in details that provide steps)
or a solution that solve my above problem ()Start Free Trial 
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// 1. magic_quote
<?php $questions = array('1' => array('question' => 'ABC','type' => 'radio', 'answer' => array('a'\"', 'asda', 'asda', )),
'2' => array('question' => 'ABC','type' => 'radio', 'answer' => array('a\'\"', 'asda', 'asda', )),
'3' => array('question' => 'ABC','type' => 'radio', 'answer' => array('a\\\'\"'', 'asda', 'asda', ))); ?>
 
// 2. mysql_real_escape_string 
<?php $questions = array('1' => array('question' => 'ABC','type' => 'radio', 'answer' => array('a'\"\r\nasda\r\nasda', )),
'2' => array('question' => 'ABC','type' => 'radio', 'answer' => array('a\'\"\r\nasda\r\nasda', )),
'3' => array('question' => 'ABC','type' => 'radio', 'answer' => array('a\\\'\"\r\nasda\r\nasda', ))); ?>
 
// My method for saving message
    $contents = "<?"."php \$questions = array($nl";
      // Add existing messages through a loop
      if ($questions)
      {
        foreach ($questions as $question) {
          $answerIndex = 0;
          
          $answers = "'answer' => array("; 
          foreach($question["answer"] as $answer)
            $answers .= "'$answer', ";
          $answers .= ")";
          
          $contents .= "'$i' => array('question' => '".$question["question"].
                                      "','type' => '".$question["type"].            
                                      "', $answers),\n";
          $i += 1;
        }
      }
      
      $array = split("\r\n", $newQuestion["answer"]);
      $answers = "'answer' => array("; 
      foreach($array as $answer)
      {
        $answers .= "'$answer', ";
      }
      $answers .= ")"; 
      
      // Add the latest message by appending:
      $contents .= "'$i' => array('question' => '".$newQuestion["question"].
                                "','type' => '".$newQuestion["type"].
                                "', $answers)";
    // Close $messages array and PHP tag
    $contents .= "); ?".">";
[+][-]04.24.2008 at 08:17AM PDT, ID: 21431812

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About this solution

Zones: PHP Scripting Language, Regular Expressions, WebApplications
Tags: PHP
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Solution Provided By: Chris_Gralike
Participating Experts: 1
Solution Grade: A
 
 
 
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