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.

Note: 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

Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.
Throws MongoDB\Driver\Exception\InvalidArgumentException if pattern or flags contain null bytes.

更新日志

版本说明

PECL mongodb 1.2.0

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.

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.

范例

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


<?php

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

?>

以上例程会输出：

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

参见

User Contributed Notes

Alejandro Wilcke 06-Sep-2019 02:32


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;