PHP SplObjectStorage::setInfo() Method: Usage and Examples

Replaces the metadata associated with the object at the current cursor.

The examples focus on the operation itself, including the important distinction: offsetSet allows setting metadata for an explicitly given object key.

What It Does

Use the examples below to observe the behavior on a small dataset before extending it to application code.

Syntax and Return Value

SplObjectStorage::setInfo(mixed $info)

The displayed signature describes the API or identifies any correction or optional dependency. When a parameter is optional, supply it only when the task requires it.

Parameters

• info: required.

Example 1: Basic Use

SplObjectStorage retains object identity and can associate independent information with each object; it is not keyed by the label property.

<?php
$one = (object) ["label" => 'alpha'];
$two = (object) ["label" => 'beta'];
$three = (object) ["label" => 'gamma'];
$store = new SplObjectStorage();
$store[$one] = "pending";
$store[$two] = "approved";
$store->rewind();
$store->setInfo("reviewed");
echo $store->getInfo();

Output from a successful local PHP 8.4 run:

reviewed

Example 2: Checking Behavior

SplObjectStorage retains object identity and can associate independent information with each object; it is not keyed by the label property.

<?php
$one = (object) ["label" => 'red'];
$two = (object) ["label" => 'green'];
$three = (object) ["label" => 'blue'];
$store = new SplObjectStorage();
$store[$one] = "pending";
$store[$two] = "approved";
$store->rewind();
$store->setInfo("reviewed");
echo $store->getInfo();

Output from a successful local PHP 8.4 run:

reviewed

Example 3: Practical Example

SplObjectStorage retains object identity and can associate independent information with each object; it is not keyed by the label property.

<?php
$one = (object) ["label" => 'first'];
$two = (object) ["label" => 'second'];
$three = (object) ["label" => 'third'];
$store = new SplObjectStorage();
$store[$one] = "pending";
$store[$two] = "approved";
$store->rewind();
$store->setInfo("reviewed");
echo $store->getInfo();

Output from a successful local PHP 8.4 run:

reviewed

Important Behavior and Edge Cases

Select the intended object first; this is not the same as updating the object itself.

Comparison with Related Approaches

Common Beginner Mistakes

Key Takeaways

• Replaces the metadata associated with the object at the current cursor.
• Select the intended object first; this is not the same as updating the object itself.
• offsetSet allows setting metadata for an explicitly given object key.

Use SplObjectStorage::setInfo when its documented behavior matches the problem. Test the relevant edge cases in your own runtime before deploying it.