PHP AutoIt-like INI file management

example.php

<?php

/*
  All Ini-related functions from AutoIt are available.
  Just add the paamayim nekudotayim (::) between "Ini" and the functio.
  E.g.: IniWrite becomes Ini::Write, IniReadSectionNames becomes Ini::ReadSectionNames
  Docs: https://www.autoitscript.com/autoit3/docs/functions/IniWrite.htm
*/

include 'phpini.class.php';

Ini::Write('example.ini', 'test', 'random_number', rand());

echo Ini::Read('example.ini', 'test', 'random_number', 'no content');

phpini.class.php

<?php

class Ini {
	public function Delete($filename, $section, $key = false) {
		$parse = Ini::readINIfile($filename);
		if($key) {
			unset($parse[$section][$key]);
		} else {
			unset($parse[$section]);
		}
		Ini::write_ini_file($parse, $filename);
	}
	public function Read($filename, $section, $key, $default) {
		$parse = Ini::readINIfile($filename);
		if(isset($parse[$section]) AND isset($parse[$section][$key])) {
			return $parse[$section][$key];
		} else {
			return $default;
		}
	}
	public function ReadSection($filename, $section, $au3like = false) {
		$parse = Ini::readINIfile($filename);
		if(isset($parse[$section])) {
			if($au3like) { //0 => key, 1 => value
				$return = array();
				$return[0] = array( 0 => sizeof($parse[$section]) );
				foreach($parse[$section] as $key=>$value) {
					$return[] = array(
						0 => $key,
						1 => $value
					);
				}
				return $return;
			} else { // key=>value
				return $parse[$section];
			}
		} else {
			return false;
		}
	}
	
	public function ReadSectionNames($filename) {
		$parse = Ini::readINIfile($filename);
		if($parse) {
			$return = array();
			foreach($parse as $key=>$value) {
				$return[] = $key;
			}
			return $return;
		} else {
			return array();
		}
	}
	public function RenameSection($filename, $section, $newsection, $flag = 0) {
		$parse = Ini::readINIfile($filename);
		if(!$parse) return false;
		if(array_key_exists($newsection, $parse)) {
			if($flag==0) { // Fail if "new section" already exist
				return false;
			} else { // Overwrite "new section"
				unset($parse[$newsection]);
			}
		}
		$parse[$newsection] = $parse[$section];
		unset($parse[$section]);
		return true;
	}
	public function Write($filename, $section, $key, $value) {
		if(!file_exists($filename)) file_put_contents($filename, null);
		if(is_writable($filename)) {
			$parse = Ini::readINIfile($filename);
			if(isset($parse[$section])) {
				$parse[$section][$key] = $value;
			} else {
				$parse[$section] = array(
					$key => $value
				);
			}
			Ini::write_ini_file($parse, $filename);
		} else {
			return false;
		}
	}
	public function WriteSection($filename, $section, $data, $index = 1) {
		$parse = Ini::readINIfile($filename);
		if(!$parse) return false;
		if(is_string($data)) {
			$arr = array();
			parse_str($data, $arr);
		} else $arr = $section;
		
	}
	
	// =========== internal use only ===========
	private function write_ini_file($assoc_arr, $path, $has_sections=TRUE) { 
		$content = ""; 
		if ($has_sections) { 
			foreach ($assoc_arr as $key=>$elem) { 
				$content .= "[".$key."]\r\n"; 
				foreach ($elem as $key2=>$elem2) { 
					if(is_array($elem2)) 
					{ 
						for($i=0;$i<count($elem2);$i++) 
						{ 
							$content .= $key2."[] = \"".$elem2[$i]."\"\r\n"; 
						} 
					} 
					else if($elem2=="") $content .= $key2." = \r\n"; 
					else $content .= $key2."=".$elem2."\r\n"; 
				} 
			} 
		} 
		else { 
			foreach ($assoc_arr as $key=>$elem) { 
				if(is_array($elem)) 
				{ 
					for($i=0;$i<count($elem);$i++) 
					{ 
						$content .= $key."[] = \"".$elem[$i]."\"\r\n"; 
					} 
				} 
				else if($elem=="") $content .= $key."=\r\n"; 
				else $content .= $key."=".$elem."\r\n"; 
			} 
		} 

		return Ini::safefilerewrite($path, $content);
	}
	
	private function safefilerewrite($fileName, $dataToSave) {
		$dataToSave = trim($dataToSave);
	    if ($fp = fopen($fileName, 'w'))
		{
			$startTime = microtime(TRUE);
			do
			{            $canWrite = flock($fp, LOCK_EX);
			   // If lock not obtained sleep for 0 - 100 milliseconds, to avoid collision and CPU load
			   if(!$canWrite) usleep(round(rand(0, 100)*1000));
			} while ((!$canWrite)and((microtime(TRUE)-$startTime) < 5));

			//file was locked so now we can store information
			if ($canWrite)
			{
				$write = fwrite($fp, $dataToSave);
				flock($fp, LOCK_UN);
			}
			fclose($fp);
			return $write;
		} else {
			return false;
		}

	}
	
	private function readINIfile($filename) {
	  if(!file_exists($filename) || !is_readable($filename)) return false;
	  $array1 = file($filename);
	  $array2 = array();
	  if(!sizeof($array1)) return array();
	  $section = '';
	  for ($line_num = 0; $line_num <= sizeof($array1); $line_num++) {
	   $filedata = @$array1[$line_num];
	   $dataline = trim($filedata);
	   $firstchar = substr($dataline, 0, 1);
	   if ($firstchar!=';' && $firstchar!='#' && $dataline!='') {
		 //It's an entry (not a comment and not a blank line)
		 if ($firstchar == '[' && substr($dataline, -1, 1) == ']') {
		   //It's a section
		   $section = strtolower(substr($dataline, 1, -1));
		 }else{
		   //It's a key...
		   $delimiter = strpos($dataline, '=');
		   if ($delimiter > 0) {
			 //...with a value
			 $key = strtolower(trim(substr($dataline, 0, $delimiter)));
			 $array2[$section][$key] = '';
			 $value = trim(substr($dataline, $delimiter + 1));
			 while (substr($value, -1, 1) == '\\') {
				 //...value continues on the next line
				 $value = substr($value, 0, strlen($value)-1);
				 $array2[$section][$key] .= stripcslashes($value);
				 $line_num++;
				 $value = trim($array1[$line_num]);
			 }
			 $array2[$section][$key] .= stripcslashes($value);
			 $array2[$section][$key] = trim($array2[$section][$key]);
			 if (substr($array2[$section][$key], 0, 1) == '"' && substr($array2[$section][$key], -1, 1) == '"') {
				$array2[$section][$key] = substr($array2[$section][$key], 1, -1);
			 }
		   }else{
			 //...without a value
			 $array2[$section][strtolower(trim($dataline))]='';
		   }
		 }
	   }else{
		 //It's a comment or blank line.  Ignore.
	   }
	  }
	  return $array2;
	}
}