PHP註釋：//或URL和html標籤的其餘部分是純文本

Question

我有這樣的輸出：<a href="#">sdfsdfsd</a>gdsfgsdfgsdgsdggsdfg

問題是，這個函數的所有HTML標籤轉換爲純文本除了那些URL像www.facebook.com （將其轉換爲<a href="www.facebook.com">www.facebook.com</a>）：

function validate_text($text = '') { 
    // This method is used internally as a FILTER_CALLBACK 
    if (mb_strlen($text, 'utf8') < 1) 
     return false; 
    // Encode all html special characters (<, >, ", & .. etc) and convert 
    //$str = nl2br(htmlspecialchars($text)); 
    $str = htmlspecialchars($text); 
    // the new line characters to <br> tags: 
    // Remove the new line characters that are left 
    $str = str_replace(array(chr(10), chr(13)), '', $str); 
    $text = preg_replace('#(script|about|applet|activex|chrome):#is', "\\1:", $str); 
    $ret = ' ' . $text; 
    $ret = preg_replace("#(^|[\n ])([\w]+?://[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "\\1<a href=\"\\2\" target=\"_blank\">\\2</a>", $ret); 
    $ret = preg_replace("#(^|[\n ])((www|ftp)\.[\w\#$%&~/.\-;:=,?@\[\]+]*)#is", "\\1<a href=\"http://\\2\" target=\"_blank\">\\2</a>", $ret); 
    $ret = preg_replace("#(^|[\n ])([a-z0-9&\-_.]+?)@([\w\-]+\.([\w\-\.]+\.)*[\w]+)#i", "\\1<a href=\"mailto:\\2@\\3\">\\2@\\3</a>", $ret); 
    //$ret = preg_replace("#^*@([)([0-9-])(])#is", "\\1<a href=\"http://\\2\" target=\"_blank\">\\2</a>", $ret); 
    $ret = substr($ret, 1); 
    return $ret; 
} 

我想是從<a href="#">something</a> <small>hello</small>到<a href="#">something</a>sadfsafasf &lt;small&gt; hello &lt;/small&gt;

Answer 1

strip_tags()將除去字符串中的所有html標記，但您將其指定爲允許的標記除外。

編輯：根據您的評論如下;

要將包含HTML標記的字符串顯示爲文本，而不使用瀏覽器解析標記，則需要使用htmlspecialchars()或htmlentities()。然後用鏈接替換@mention使用正則表達式和preg_replace()。

這裏後的內容（我認爲）的例子，你是： -

<?php 

$string = "Some text with some <span>HTML tags in it</span> and a @mention to someone"; 

// Turn special characters into html entities 
$new_string = htmlspecialchars($string); 

// Replace @mention with a link 
$output = preg_replace("/@(\w+)/",'<a href="http://www.example.com/profiles/$1">$1</a>',$new_string); 

// Will produce 'Some text with some &lt;span&gt;HTML tags in it&lt;/span&gt; and a <a href="http://www.example.com/profiles/mention">mention</a> to someone' 
echo $output; 

?>