php正则表达式具体的，真头大了。该怎么解决

$str = '123[test] abc c1 c2 c3
456 def d1[test] d2 d3';

$ar = split("[\n\r]+",$str);

$ar1 = explode(' ',$ar[0]);
$ar2 = explode(' ',$ar[1]);

function fmt($ar) {
   foreach($ar as $k => $v) $ar[$k] = preg_replace('/\[.*\]/','',$v);
   return $ar;
}
$ar1 = fmt($ar1);
$ar2 = fmt($ar2);

$str = implode(' ',$ar1)."\n".implode(' ',$ar2);

echo "
{$str}";

/*
//Output
123 abc c1 c2 c3
456 def d1 d2 d3
*/

------解决方案--------------------
探讨


不可能不会吧，这个里面就用到了下正则表达式呀
preg_replace('/\[.*\]/','',$v);
因为行数会很多，想有效率而表达简单一点解决！


------解决方案--------------------
行多倒不怕，上面代码稍做修改就可以适应不定行数据。

------解决方案--------------------
PHP code
$str = 
'123[test] abc c1 c2 c3
456 def d1[test] d2 d3
789 ghi[sfjsldf] z1 z2 z3';

$ar = split("[\n\r]+",$str);

$arTMP = array();
foreach($ar as $v) $arTMP[] = explode(' ',$v);

function fmt($ar) {
   foreach($ar as $k => $v) $ar[$k] = preg_replace('/\[.*\]/','',$v);
   return $ar;
}
foreach($arTMP as $k => $v) $arTMP[$k] = implode(' ',fmt($v));

$str = implode("\n",$arTMP);

echo "
{$str}";

/*
//Output
123 abc c1 c2 c3
456 def d1 d2 d3
789 ghi z1 z2 z3
*/

------解决方案--------------------
晕。。我只要看到正则就会觉得头大。。
PHP code
$str = 
'123[test] abc c1 c2 c3
456 def d1[test] d2 d3
789 ghi[sfjsldf] z1 z2 z3';

$str = preg_replace('/\[.*\]/','',$str);

echo "
{$str}";

/*
//Output
123 abc c1 c2 c3
456 def d1 d2 d3
789 ghi z1 z2 z3
*/