MongoId
PHP Manual

MongoId::__construct

Creates a new id

Description

public MongoId::__construct ([ string $id = NULL ] )

Parameters

id

A string to use as the id. Must be 24 hexidecimal characters. If an invalid string is passed to this constructor, the constructor will ignore it and create a new id value.

Return Values

Returns a new id.

Examples

Example #1 MongoId::__construct example

This example shows how to create a new id. This is seldom necessary, as the driver adds an id to arrays automatically before storing them in the database.

<?php

  $id1 = new MongoId();
  echo "$id1\n";

  $id2 = new MongoId();
  echo "$id2\n";

  ?>

The above example will output something similar to:

49a7011a05c677b9a916612a
49a702d5450046d3d515d10d

Example #2 Parameter example

This example shows how to use a string parameter to initialize a MongoId with a given value.

<?php
  $id1 = new MongoId();

  // create a new id from $id1
  $id2 = new MongoId("$id1");

  // show that $id1 and $id2 have the same hexidecimal value
  var_dump($id1 == $id2);
  ?>

The above example will output something similar to:

bool(true)

See Also

  • MongoId::__toString