php 把数组保存为标准的数组格式，存储到文件中

<?php
$file='./test.php';
$array=array('color'=> array('blue','red','green'),'size'=> array('small','medium','large'));
cache_write($file,$array,'rows',false); //写入
function cache_write($filename,$values,$var='rows',$format=false){
$cachefile=$filename;
$cachetext="<?php\r\n".'$'.$var.'='.arrayeval($values,$format).";";
return writefile($cachefile,$cachetext);
} //数组转换成字串
function arrayeval($array,$format=false,$level=0){
$space=$line='';
if(!$format){
for($i=0;$i<=$level;$i++){
$space.="\t";
}
$line="\n";
}
$evaluate='Array'.$line.$space.'('.$line;
$comma=$space;
foreach($array as $key=> $val){
$key=is_string($key)?'\''.addcslashes($key,'\'\\').'\'':$key;
$val=!is_array($val)&&(!preg_match('/^\-?\d+$/',$val)||strlen($val) > 12)?'\''.addcslashes($val,'\'\\').'\'':$val;
if(is_array($val)){
$evaluate.=$comma.$key.'=>'.arrayeval($val,$format,$level+1);
}else{
$evaluate.=$comma.$key.'=>'.$val;
}
$comma=','.$line.$space;
}
$evaluate.=$line.$space.')';
return $evaluate;
} //写入文件
function writefile($filename,$writetext,$openmod='w'){
if(false!==$fp=fopen($filename,$openmod)){
flock($fp,2);
fwrite($fp,$writetext);
fclose($fp);
return true;
}else{
return false;
}
}