WebInstallerWelcome.php

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<?php
class WebInstallerWelcome extends WebInstallerPage {
 
    public function execute() {
        if ( $this->parent->request->wasPosted() && $this->getVar( '_Environment' ) ) {
            return 'continue';
        }
        $this->parent->output->addWikiTextAsInterface( wfMessage( 'config-welcome' )->plain() );
        $status = $this->parent->doEnvironmentChecks();
        if ( $status->isGood() ) {
            $this->parent->output->addHTML( '<span class="success-message">' .
                wfMessage( 'config-env-good' )->escaped() . '</span>' );
            $this->parent->output->addWikiTextAsInterface(
                wfMessage( 'config-welcome-section-copyright',
                    SpecialVersion::getCopyrightAndAuthorList(),
                    wfExpandUrl( $this->parent->getDocUrl( 'Copying' ) )
                )->plain()
            );
            $this->startForm();
            $this->endForm();
        } else {
            $this->parent->showStatusMessage( $status );
        }
 
        return '';
    }
 
}