在朋友的帮助下对一个函数的改进

原：

/**
* @method 根据输入参数string的内容(以';'或','或' ')分割字串
* @name cutStrToArrOrStr()
* @Param $str be going to change string
* boolean or integer arr false or 0 return string
* true or not 0 return array
* $num tags counts num
* @Return string or array()
*/
function cutStrToArrOrStr($str = null,$arrBoolean = false,$num = null) {
$strTemp = null;

if(is_string($str)){
$str = trim($str);

if(empty($str)){
$this->strTags = $str;
}

if((strpos($str, ',') === false) && (strpos($str, '，') === false)&& (strpos($str, '；') === false)&& (strpos($str, ';') === false) && (strpos($str, ' ') === false)){
$this->strTags = $str;
}else{
$str = str_replace('，',',',$str);
$str = str_replace(';',',',$str);
$str = str_replace('；',',',$str);
$str = str_replace(' ',',',$str);

if(!isset($num)){
$num = $this->strTagNums;
}

if(substr_count($str,',') < $num){
$num = substr_count($str,',');
}

$str = explode(',',$str);

$i = 0;
foreach($str as $key=>$value){
if(trim($value) == '' || (mb_strlen($value) > 12)) continue;
$strTemp .= $value.',';
$i++;
if($i >= $num) break;
}

$strTemp = substr($strTemp,0,-1);
$this->strTags = ((boolean)$arrBoolean)?$strTemp:explode(',',$strTemp);
}
}else{
$this->strTags = $strTemp;
}

return $this->strTags;
}

现在：版本2

将其中划线部分更改为正则表达式来做：如下~~~~~~~~

if(!isset($num)){

$num = $this->strTagNums;

}

if(substr_count($str,',') < $num){

$num = substr_count($str,',');

}

$str = preg_split("/(;|,|，|；|/x20|/xEF/xBC/x9B|/xEF/xBC/x8C)/", $str,$num,PREG_SPLIT_NO_EMPTY);

现在版本3

if(!isset($num)){

$num = $this->strTagNums;

}

if(substr_count($str,',') < $num){

$num = substr_count($str,',');

}

$str = preg_split("/(;|,|，|；|/x20|/xEF/xBC/x9B|/xEF/xBC/x8C)/", $str,$num,PREG_SPLIT_NO_EMPTY);

unset($str[sizeof($str)-1]);

如有需要：

reset($str);

````````````````````````````````````````````````````````

现在版本4

--------------------------------------------------------------------------

$i = 0;
foreach($str as $key=>$value){
if(trim($value) == '' || (mb_strlen($value) > 12)) continue;
$strTemp .= $value.',';
$i++;
if($i >= $num) break;
}

----------------------------------------------------------------------------

改：

---------------------------------------------------------------------------
foreach($str as $key=>$value){
if(trim($value) == '' || (mb_strlen($value) > 12)) continue;
$strTemp .= $value.',';
}

----------------------------------------------------------------------

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