在 PHP 中优化 preg_match()

Question

我在 PHP 中使用以下函数使用preg_match(); 从包含“near”的字符串中检测实体和位置。有没有更优化的方法来为此编写代码？我使用了很多 if 语句，似乎可以改进，但我不确定如何。

// Test cases
$q = "red robin near seattle";
//$q = "red robin near me";
//$q = "red robin nearby";
//$q = "red robin near my location";

function getEntityAndLocation($q){

    $entityAndLocation = array("entity" => null, "location" => null);

    if(preg_match('(nearby)', $q) === 1) {
        $breakdown = explode("nearby", $q);
        $entityAndLocation["entity"] = $breakdown[0];
        $entityAndLocation["location"] = $breakdown[1];
        return $entityAndLocation;
    }

    if(preg_match('(near my location)', $q) === 1) {
        $breakdown = explode("near my location", $q);
        $entityAndLocation["entity"] = $breakdown[0];
        $entityAndLocation["location"] = $breakdown[1];
        return $entityAndLocation;
    }

    if(preg_match('(near me)', $q) === 1) {
        $breakdown = explode("near me", $q);
        $entityAndLocation["entity"] = $breakdown[0];
        $entityAndLocation["location"] = $breakdown[1];
        return $entityAndLocation;
    }

    if(preg_match('(near)', $q) === 1) {
        $breakdown = explode("near", $q);
        $entityAndLocation["entity"] = $breakdown[0];
        $entityAndLocation["location"] = $breakdown[1];
        return $entityAndLocation;
    }

}

if(preg_match('(near)', $q) === 1) {

  $entityAndLocation = getEntityAndLocation($q);

  print_r($entityAndLocation);

}

Answer 1

使用preg_split() 使用正则表达式作为分隔符来分割字符串。您可以编写一个匹配所有模式的正则表达式。

function getEntityAndLocation($q){

    $entityAndLocation = array("entity" => null, "location" => null);

    $breakdown = preg_split('/near(?:by| my location| me)?/', $q);
    if (count($breakdown) >= 2) {
        $entityAndLocation["entity"] = $breakdown[0];
        $entityAndLocation["location"] = $breakdown[1];
        return $entityAndLocation;
    }
    return $entityAndLocation;
}

正则表达式匹配near，可选地后跟by、my location或me。