duanpo7796 2011-06-21 14:15
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已采纳

在preg_replace中使用/ e标志时,PHP不评估只读属性

think we have this script :

class String {
protected $text = null;
public function __construct($text){
    $this->text = $text;
}

public function __get($var){ return $this->$var; }

public function replace($search, $replace, $limit = -1, $ignoreCase = false){
    extract($GLOBALS, EXTR_REFS);
    return preg_replace($search, $replace, $this->text, $limit, $count);
}
}

class Setting {
private $active = "not active";

public function __get($var){
    return $this->$var;
}
}

$s = new Setting;

function replace(){
$string = new String('System is [var:$s->active]');
echo $string->replace('/\[var:([^\]]+)\]/ie', 'isset(\1)? \1: "";');
}

replace();

now $active property will not evaluate is it a bug or i should do something special ?

SOLVED
with a lot of thanks to dear Artefacto.
the problem was solved

i should implement __isset to use isset function for readonly property

  • 写回答

3条回答 默认 最新

  • dream_wu2015 2012-12-03 08:22
    关注

    Have to implement __isset function for String class when want to use isset()

    class Setting {
        public function __isset($var){
            return isset($this->$var);
        }
    }
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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