php 字符串 format 类

<?phpclass PStr extends Packer{ var $symbol; function __construct($str){ parent::__construct($str); $this->symbol=$symbol; } public function fill(){ $args=func_get_args(); return $this->fillHash($args,'@'); } private function fillCallBack($symbol,$key,$fmtbody,$hs){ $value=$hs[$key];$fmtbody=str_replace('//"','"',$fmtbody); /* fillHash 中的 preg_replace 在回调时会转义引号(")为(/"),在这里需转回 */preg_match('/(/w+)(?:/:(.+))?/',$fmtbody,$m);$value=$hs[$key];$ar=preg_split('/(?<!////):/',$fmtbody);for($i=0;$i<count($ar);$i++){switch($ar[$i]){case 'r':$value=$_REQUEST[$key];break;case 'd':$body=$ar[++$i];$value=$this->formatDate($body,$value);break;case 'h':$body=$ar[++$i];$dic=PStr($body)->toHash('=');$value=$dic[$value];case 't':$body=$ar[++$i];$dic=PStr($body)->toHash('=');if(array_key_exists($value,$dic)){$value=$dic[$value];}break;case 'f':$body=$ar[++$i];$value=$body($value);break;//--------------modify--------------case 'eval':$exp=$ar[++$i];$exp=preg_replace('/////([/:/$/}])/','$1',$exp); //转义还原$t=preg_split('/(?<!////);/',$exp);$t[count($t)-1]='return '.$t[count($t)-1].';';$exp=implode(';',$t);$value=eval($exp);break;//--------------modify--------------}} return $value; } public function fillHash($hs,$symbol='@',&$obj=null,$func='fillCallBack'){ if($hs==null )$hs=array();foreach($hs as $k=>$v){if(gettype($v)=='array')$hs[$k]=implode(',',$v);}if($symbol=='$')$symbol='//$';//--------------modify-------------- $r='//{('.$symbol.')(/w+?)(?::((?:////}|[^}])+?))?/}/e'; //--------------modify-------------- if($obj==null)$obj=$this; return preg_replace($r,"/$obj->/$func('$1','$2','$3',/$hs)",$this->packin); } public function formatDate($fmt,$str){ if(strtotime($str)){ $str=date($fmt,strtotime($str)); //'Y-m-d h:i:s' } return $str; } /*形如,----键:值,键:值----字符串不带引号.*/ public function toHash($d=':') {$r='/((?:[^,'.$d.']|////'.$d.')+)'.$d.'(.+?)(?=,[^,]+'.$d.'|$)/'; $h=array(); preg_match_all($r,$this->packin,$ar,PREG_SET_ORDER); foreach($ar as $i=>$match){$h[$match[1]]=$match[2]; } return $h; }}function PStr($str){ return new PStr($str);}?>