PHP preg_replace多個單詞

Question

我用preg_replace替換字符串時出現問題。

function addClass($search, $string) { 

    return preg_replace("/\b($search)\b/", "<div class=mark>$1</div>", $string); 

} 

$string = "We won again"; 
$result = addClass("We", $string); 

output ---> <div class=mark>We</div> won again 

我想爲多個字符串製作$search。

$string = "We won again"; 
$result = addClass(array("We", "again"), $string); 

output ---> <div class=mark>We</div> won <div class=mark>again</div> 

如何實現多個搜索字符串放入數組？

在此先感謝...

Answer 1

您可以使用or expresion在正則表達式 - (We|again)

function addClass($search, $string) { 
    return preg_replace("/\b(". implode('|', $search) . ")\b/", "<div class=mark>$1</div>", $string); 
} 

而且，如果要保存舊的語法，從一個字符串使一個數組：

function addClass($search, $string) { 
    if(! is_array($search)) $search = array($search); 
    return preg_replace("/\b(". implode('|', $search) . ")\b/", "<div class=mark>$1</div>", $string); 
} 

demo

Answer 2

使用is_array和array_map功能的替代解決方案：

function addClass($search, $string) { 
    $search = (is_array($search))? array_map(function($v) { return "/\b($v)\b/"; }, $search) : ["/\b($search)\b/"]; 
    return preg_replace($search, "<div class=mark>$1</div>", $string); 
}