获得两个标签

Question

我怎样才能从下面的标签值之间的文本：

{desc=1} 
This is a description 
{/desc} 

在{desc=1}的数量变化。我也想获得价值。

更新：

也可以在字符串中更desc，例如

{desc=1} 
    This is a description 
{/desc} 
{desc=2} 
    other description 
{/desc} 
... 

Answer 1

这将捕获你想要的一切。

$data = <<<EOT 
{desc=1} 
    This is a description 
{/desc} 
{desc=2} 
    other description 
{/desc} 
EOT; 

preg_match_all('#{desc=(\d+)}(.*?){/desc}#s', $data, $matches); 

var_dump($matches); 

输出：

array(3) { 
    [0]=> 
    array(2) { 
    [0]=> 
    string(44) "{desc=1} 
    This is a description 
{/desc}" 
    [1]=> 
    string(40) "{desc=2} 
    other description 
{/desc}" 
    } 
    [1]=> 
    array(2) { 
    [0]=> 
    string(1) "1" 
    [1]=> 
    string(1) "2" 
    } 
    [2]=> 
    array(2) { 
    [0]=> 
    string(29) " 
    This is a description 
" 
    [1]=> 
    string(25) " 
    other description 
" 
    } 
} 

Answer 2

尝试这种

function getInbetweenStrings($start, $end, $str){ 
    $matches = array(); 
    $regex = "/$start([a-zA-Z0-9_]*)$end/"; 
    preg_match_all($regex, $str, $matches); 
    return $matches[1]; 
} 

$str = "{attr1}/{attr2}/{attr3}"; 
$str_arr = getInbetweenStrings('{', '}', $str); 

print_r($str_arr); 

在上面的例子中{和}

是标签，在其间它们的字符串得到萃取。

Answer 3

另一个非常简单的方法是我们可以创建一个可以随时调用的简单函数。

<?php 
    // Create the Function to get the string 
    function GetStringBetween ($string, $start, $finish) { 
    $string = " ".$string; 
    $position = strpos($string, $start); 
    if ($position == 0) return ""; 
    $position += strlen($start); 
    $length = strpos($string, $finish, $position) - $position; 
    return substr($string, $position, $length); 
    } 
?> 

，这里是你的问题

$string1=" 
{desc=1} 
This is a description 
{/desc}"; 

$string2=" 
{desc=1} 
This is a description 
{/desc} 
{desc=2} 
    other description 
{/desc}"; 

echo GetStringBetween ($string1, "{desc=1}", "{/desc}"); 
echo GetStringBetween ($string2, "{desc=1}", "{/desc}"); 
echo GetStringBetween ($string2, "{desc=2}", "{/desc}"); 

用法的例子更多细节，请阅读http://codetutorial.com/howto/how-to-get-of-everything-string-between-two-tag-or-two-strings。