class.ilIniFile.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */
 
 
class ilIniFile
{
    public $INI_FILE_NAME = "";
 
    public $ERROR = "";
 
    public $GROUPS = array();
 
    public $CURRENT_GROUP = "";
 
    public function __construct($a_ini_file_name)
    {
        //check if a filename is given
        if (empty($a_ini_file_name)) {
            $this->error("no_file_given");
            return false;
        }
 
        $this->INI_FILE_NAME = $a_ini_file_name;
        return true;
    }
 
    public function read()
    {
        //check if file exists
        if (!file_exists($this->INI_FILE_NAME)) {
            $this->error("file_does_not_exist");
            return false;
        } else {
            //parse the file
            if ($this->parse() == false) {
                return false;
            }
        }
 
        return true;
    }
 
    public function parse()
    {
        //use php4 function parse_ini_file
        $this->GROUPS = @parse_ini_file($this->INI_FILE_NAME, true);
 
        //check if groups are filled
        if ($this->GROUPS == false) {
            // second try
            $this->fixIniFile();
            
            $this->GROUPS = @parse_ini_file($this->INI_FILE_NAME, true);
            if ($this->GROUPS == false) {
                $this->error("file_not_accessible");
                return false;
            }
        }
        //set current group
        $temp = array_keys($this->GROUPS);
        $this->CURRENT_GROUP = $temp[count($temp)-1];
        return true;
    }
 
    public function fixIniFile()
    {
        // first read content
        $lines = array();
        $fp = @fopen($this->INI_FILE_NAME, "r");
        while (!feof($fp)) {
            $l = fgets($fp, 4096);
            $skip = false;
            if ((substr($l, 0, 2) == "/*" && $starttag) ||
                substr($l, 0, 5) == "*/ ?>") {
                $skip = true;
            }
            $starttag = false;
            if (substr($l, 0, 5) == "<?php") {
                $l = "; <?php exit; ?>";
                $starttag = true;
            }
            if (!$skip) {
                $l = str_replace("\n", "", $l);
                $l = str_replace("\r", "", $l);
                $lines[] = $l;
            }
        }
        fclose($fp);
        
        // now write it back
        $fp = @fopen($this->INI_FILE_NAME, "w");
        
        if (!empty($fp)) {
            foreach ($lines as $l) {
                fwrite($fp, $l . "\r\n");
            }
        }
        fclose($fp);
    }
    
    public function write()
    {
        $fp = @fopen($this->INI_FILE_NAME, "w");
        
        if (empty($fp)) {
            $this->error("Cannot create file $this->INI_FILE_NAME");
            return false;
        }
        
        //write php tags (security issue)
        $result = fwrite($fp, "; <?php exit; ?>\r\n");
 
        $groups = $this->readGroups();
        $group_cnt = count($groups);
        
        for ($i=0; $i<$group_cnt; $i++) {
            $group_name = $groups[$i];
            //prevent empty line at beginning of ini-file
            if ($i==0) {
                $res = sprintf("[%s]\r\n", $group_name);
            } else {
                $res = sprintf("\r\n[%s]\r\n", $group_name);
            }
            
            $result = fwrite($fp, $res);
            $group = $this->readGroup($group_name);
            
            for (reset($group); $key=key($group);next($group)) {
                $res = sprintf("%s = %s\r\n", $key, "\"" . $group[$key] . "\"");
                $result = fwrite($fp, $res);
            }
        }
        
        
        fclose($fp);
 
        return true;
    }
 
    public function show()
    {
        $groups = $this->readGroups();
        $group_cnt = count($groups);
        
        //clear content
        $content = "";
        
        // go through all groups
        for ($i=0; $i<$group_cnt; $i++) {
            $group_name = $groups[$i];
            //prevent empty line at beginning of ini-file
            if ($i==0) {
                $content = sprintf("[%s]\n", $group_name);
            } else {
                $content .= sprintf("\n[%s]\n", $group_name);
            }
 
            $group = $this->readGroup($group_name);
            
            //go through group an display all variables
            for (reset($group); $key=key($group);next($group)) {
                $content .= sprintf("%s = %s\n", $key, $group[$key]);
            }
        }
 
        return $content;
    }
    
    public function getGroupCount()
    {
        return count($this->GROUPS);
    }
    
    public function readGroups()
    {
        $groups = array();
 
        for (reset($this->GROUPS);$key=key($this->GROUPS);next($this->GROUPS)) {
            $groups[]=$key;
        }
 
        return $groups;
    }
    
    public function groupExists($a_group_name)
    {
        if (!isset($this->GROUPS[$a_group_name])) {
            return false;
        }
        
        return true;
    }
    
    public function readGroup($a_group_name)
    {
        if (!$this->groupExists($a_group_name)) {
            $this->error("Group '" . $a_group_name . "' does not exist");
            return false;
        }
        
        return $this->GROUPS[$a_group_name];
    }
    
    public function addGroup($a_group_name)
    {
        if ($this->groupExists($a_group_name)) {
            $this->error("Group '" . $a_group_name . "' exists");
            return false;
        }
 
        $this->GROUPS[$a_group_name] = array();
        return true;
    }
    
    public function removeGroup($a_group_name)
    {
        if (!$this->groupExists($a_group_name)) {
            $this->error("Group '" . $a_group_name . "' does not exist");
            return false;
        }
 
        unset($this->GROUPS[$a_group_name]);
        return true;
    }
 
    public function variableExists($a_group, $a_var_name)
    {
        return isset($this->GROUPS[$a_group][$a_var_name]);
    }
    
    
    public function readVariable($a_group, $a_var_name)
    {
        if (!isset($this->GROUPS[$a_group][$a_var_name])) {
            $this->error("'" . $a_var_name . "' does not exist in '" . $a_group . "'");
            return false;
        }
        
        return trim($this->GROUPS[$a_group][$a_var_name]);
    }
    
    public function setVariable($a_group_name, $a_var_name, $a_var_value)
    {
        if (!$this->groupExists($a_group_name)) {
            $this->error("Group '" . $a_group_name . "' does not exist");
            return false;
        }
        
        $this->GROUPS[$a_group_name][$a_var_name] = $a_var_value;
        return true;
    }
    
    public function error($a_errmsg)
    {
        $this->ERROR = $a_errmsg;
 
        return true;
    }
    
    public function getError()
    {
        return $this->ERROR;
    }
} //END class.ilIniFile