Custom Runtimes with PHP

Let's use layers to include a PHP runtime, provided by https://bref.sh/ (find the layers at here).

As of this video, the latest Layer (appropriate for our use case) is arn:aws:lambda:us-east-2:209497400698:layer:php-81:17.

1mkdir foo-func-php
2cd foo-func-php
3 
4# Create project, add in dependency `brev/brev`
5# Equivalent to running "composer require brev/brev"
6composer init

We then can code up the PHP Lambda function. Just like with NodeJS, it's pretty simple!

 1<?php
 2 
 3require __DIR__ . '/vendor/autoload.php';
 4 
 5use Bref\Context\Context;
 6 
 7return function ($event, Context $context) {
 8    echo json_encode(["info" => "this is going to cloudwatch"]);
 9 
10    return json_encode(["message" => sprintf("Hello, %s!", $event['name'] ?? "unknown")]);
11};

Then we can package it up and create our function with the IAM Role and Layer pre-defined.

 1# Zip it up
 2zip -r9q index.zip .
 3 
 4# Create the function with a PHP runtime layer
 5# Note that handler is the file name for PHP runtimes
 6aws --profile cloudcasts lambda create-function \
 7    --function-name foo_func_php \
 8    --role arn:aws:iam::601364042938:role/service-role/foo_func_go-role-h6pfawno \
 9    --handler index.php \
10    --runtime provided.al2 \
11    --memory-size 512 \
12    --layers "arn:aws:lambda:us-east-2:209497400698:layer:php-81:17" \
13    --zip-file fileb://index.zip
14 
15# Invoke it!
16aws --profile cloudcasts lambda invoke \
17    --function-name foo_func_php \
18    --invocation-type RequestResponse \
19    --cli-binary-format raw-in-base64-out \
20    --payload '{"name": "Chris"}' \
21    output.json
22 
23cat output.json

This works as expected!