用count替換strlen新警告如何重寫函數正確？

Question

我已經升級我的WordPress網站，並獲得在頭警告，我是新手在PHP，但發現答案由count更換strlen，然後我得到一個警告

function head() { 
    if (strlen ($this->description) > 0) { 
    // if (count ($this->description) > 0) { 
     if (function_exists ('mb_substr')) 
      $description = mb_substr (strip_tags ($this->description), 0, $this->max_length); 
     else 
      $description = substr (strip_tags ($this->description), 0, $this->max_length); 
     $description = trim (preg_replace ("/[\r\n ]+/", ' ', $description)); 
     $description = HeadSpace_Plugin::specialchars ($description); 

     echo '<meta name="description" content="'.$description.'" />'."\r\n"; 
    } 
} 

有人可以幫我改寫這個功能嗎？謝謝

Answer 1

你有沒有試過？

if (strlen($this->description) > 0) { 
     if (function_exists ('mb_substr')) 
      $description = mb_substr (strip_tags ($this->description), 0, $this->max_length); 
     else 
      $description = substr (strip_tags ($this->description), 0, $this->max_length); 

     $description = trim (preg_replace ("/[\r\n ]+/", ' ', $description)); 
     $description = HeadSpace_Plugin::specialchars ($description); 

     echo '<meta name="description" content="'.$description.'" />'."\r\n"; 
    }