bibtex_to_json.php

<?php
	//Helpers
	function s($text){
		return "\"".trim($text," }{")."\"";
	}
	function m1($m){
		return s($m[1]) . ":" . s($m[2]);
	}

	function m2($m){
		return s($m[1]) . ":" . s($m[2]).",";
	}
	
	//Parse function
	function bibtexToJson($filename){
		$content = file_get_contents($filename);
		$content = preg_replace("/\@(\w)*\{(.*),/","",$content);
		$content = mb_substr($content,0,strrpos($content,"}"));

		$content = preg_replace_callback("/(\\w+)\\s*=\\s*\\{([\\/\sa-zA-Z0-9.:,\}\{\-#]*)\\}/","m1", $content);
		$content = preg_replace_callback("/(\w+)\s*=\s*([?!\}\/\\\sa-zA-Z0-9.:,\#]*),/","m2",$content);

		return json_decode("{".$content."}",true);
	}

?>