Question

我必须限制用户在发送消息时遵循已定义的模板集。定义的模板也可以有占位符，用户可以在运行时替换它们。

如果消息与已预定义的模板匹配，我该如何检查。

// Predefined template
$template = 'Hi {{name}}, Hope you are enjoying our service. See you on {{date}}';
$template = 'Bank will remain closed on {{date}} on account of {{reason}}.';

用户可以编写这样的消息，该消息应与模板匹配

$message = 'Hi E, Hope you are enjoying our services. See you on 20th Jan';
$template = 'Bank will remain closed on 20th Jan on account of holiday.';

这将是一个无效的模板

$message = 'Hi E, Hope we are enjoying your services. See you on 20th Jan';
$template = 'Bank will remain open on 20th Jan on account of holiday.';

如何使用PHP中的预定义模板验证带有替换占位符的字符串？

Answer 1

您可以使用.+?代替{{wildcard}}。这将允许任何字符，直到第一次出现下一个字符（和剩余的文本）。 .是任何角色。 +是前一个字符中的一个或多个。 ?告诉+在第一次出现时停止。 \正在转义字符串中的特殊字符。前导和尾随/是分隔符，指示正则表达式的开始和结束位置。

PHP用法：

$message[] = 'Hi E, Hope you are enjoying our services. See you on 20th Jan';
$template[] = 'Bank will remain closed on 20th Jan on account of holiday.';
$message[] = 'Hi E, Hope we are enjoying your services. See you on 20th Jan';
$template[] = 'Bank will remain open on 20th Jan on account of holiday.';
$templatem = '/Hi .+?, Hope you are enjoying our services\. See you on .+?/';
$templatet = '/Bank will remain closed on .+? on account of .+?\./';
foreach($message as $key => $mes) {
if(preg_match($templatem, $mes)) {
    echo 'Match' . "\n";
} else {
    echo 'No Match' . "\n";
}
if(preg_match($templatet, $template[$key])) {
    echo 'Match' . "\n";
} else {
    echo 'No Match' . "\n";
}
}

请注意，在您的第一个模板中，您有service.，但在两个示例中，如果您希望services.是可选的，则s使用? s后shouldChangeCharactersInRange }}

PHP演示：https://eval.in/501441
Regex101演示：https://regex101.com/r/cO2oD2/1

在php中匹配模板字符串与占位符

1 个答案: