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    MongoDB\BSON\Regex::__construct

    (mongodb >=1.0.0)

    MongoDB\BSON\Regex::__construct — Construct a new Regex

    说明

    final public MongoDB\BSON\Regex::__construct(string $pattern, string $flags = "")

    参数

    pattern (string)

    The regular expression pattern.

    注意: The pattern should not be wrapped with delimiter characters.

    flags (string)

    The » regular expression flags. Characters in this argument will be sorted alphabetically.

    错误／异常

    更新日志

    版本 说明
    PECL mongodb 1.2.0

    The flags argument is optional and defaults to an empty string.

    Characters in the flags argument will be sorted alphabetically when a Regex is constructed. Previously, the characters were stored in the order provided.

    MongoDB\Driver\Exception\InvalidArgumentException is thrown if pattern or flags contain null bytes. Previously, values would be truncated at the first null byte.

    示例

    示例 #1 MongoDB\BSON\Regex::__construct() example

    <?php

    $regex     = new MongoDB\BSON\Regex('^foo', 'i');
    var_dump($regex);

    ?>

    以上示例会输出：

    object(MongoDB\BSON\Regex)#1 (2) {
  ["pattern"]=>
  string(4) "^foo"
  ["flags"]=>
  string(1) "i"
}
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    User Contributed Notes 1 note

    up
    2
    Alejandro Wilcke
    5 years ago
    This matches with any fieldName that includes the string:
    $mongoRegex = new MongoDB\BSON\Regex("$string", "i");

    This matches with any fieldName that STARTS with the string:
    $mongoRegex = new MongoDB\BSON\Regex("^$string", "i");

    $cursor = $collection->find( [ 'fieldName' => $mongoRegex ] );

    $docs = [];

    foreach($cursor as $doc){
         $docs[] = $doc;
    }

    return $docs;
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