How can I analyze a PHP project that doesn’t have a “Build” stage? I have the following pipeline:

trigger:
  branches:
    include:
    - '*'

pool:
  vmImage: 'ubuntu-latest'

variables:
  # Sonar-related variables
  SONARQUBE_ENDPOINT: 'myConnection'
  PROJECT_KEY: 'myKey'
  PROJECT_NAME: MyProject'
  PROJECT_VERSION: '1.0'

steps:
- task: SonarQubePrepare@7
  displayName: "Prepare SonarQube analysis"
  inputs:
    SonarQube: $(SONARQUBE_ENDPOINT) 
    scannerMode: 'Other' 
    configMode: 'manual' 
    # Sonar project information
    sonarProjectKey: $(PROJECT_KEY)
    sonarProjectName: $(PROJECT_NAME)
    sonarProjectVersion: $(PROJECT_VERSION)
    extraProperties: |
      sonar.sources=src
      sonar.language=php
      sonar.exclusions=**/*.html,**/*.css,**/*.js

- task: SonarQubeAnalyze@7
  displayName: "Run SonarQube Analysis"

- task: SonarQubePublish@7
  displayName: "Publish SonarQube Quality Gate Result"
  inputs:
    pollingTimeoutSec: '600'

and it doesn’t fail but at the same at the “Publish” stage it says that there’s no analysis to publish!

What should I do to get this working?