返回子串與正則表達式

Question

我有以下字符串，例如：'Hello [owner], we could not contact by phone [phone], it is correct?'。

正則表達式想返回數組的形式，所有這一切都在[]之內。括號內只有字母字符。

返回：

$array = [ 
    0 => '[owner]', 
    1 => '[phone]' 
]; 

我應該如何着手有這個回報率在PHP？

Answer 1

嘗試：

$text = 'Hello [owner], we could not contact by phone [phone], it is correct?'; 
preg_match_all("/\[[^\]]*\]/", $text, $matches); 
$result = $matches[0]; 
print_r($result); 

輸出：

Array 
(
    [0] => [owner] 
    [1] => [phone] 
) 

Answer 2

我假設這一切的最終目標是要與其它一些文本，以取代[placeholder] S，所以在使用preg_replace_callback代替：

<?php 
$str = 'Hello [owner], we could not contact by phone [phone], it is correct?'; 

$fields = [ 
    'owner' => 'pedrosalpr', 
    'phone' => '5556667777' 
]; 

$str = preg_replace_callback('/\[([^\]]+)\]/', function($matches) use ($fields) { 
    if (isset($fields[$matches[1]])) {    
    return $fields[$matches[1]];      
    } 
    return $matches[0];    
}, $str);   

echo $str; 
?> 

輸出：

 
Hello pedrosalpr, we could not contact by phone 5556667777, it is correct?