Playground stuck during installation in PHP 7.2 and 7.3 if a locale is passed

[zaerl]

Description

In PHP 7.2 and 7.3 if a locale is passed the installation got stuck with a There has been a critical error on this website..

[04-Aug-2025 12:12:56 UTC] WASM Crash Fatal: PHP.run() failed with exit code 255. Error: PHP.run() failed with exit code 255.
    at h.then.dispatchEvent.type (https://playground.wordpress.net/worker-thread-ZbhEMWym.js:60:5284)
    at async Promise.allSettled (index 0)
    at async PHPResponse.fromStreamedResponse (https://playground.wordpress.net/worker-thread-ZbhEMWym.js:4:15915)
    at async PHP.run (https://playground.wordpress.net/worker-thread-ZbhEMWym.js:54:843)
    at async WordPressFetchNetworkTransport.prefetchUpdateChecks (https://playground.wordpress.net/worker-thread-ZbhEMWym.js:1681:626)
    at async PlaygroundWorkerEndpoint.prefetchUpdateChecks (https://playground.wordpress.net/worker-thread-ZbhEMWym.js:1739:149)

1. https://playground.wordpress.net/?php=7.2&wp=6.3&networking=yes&language=it_IT&multisite=no
2. https://playground.wordpress.net/?php=7.3&wp=6.3&networking=yes&language=it_IT&multisite=no

Other versions are working.

[zaerl]

@adamziel update.

On versions 7.2 and 7.3, $wpdb->prepare generates thousands of warnings in debug mode.

Quick debug on wpdb:

[08-Aug-2025 09:36:43 UTC] PHP Notice:  Undefined offset: 5 in /wordpress/wp-includes/class-wpdb.php on line 1531
[08-Aug-2025 09:36:43 UTC] Key: 5
[08-Aug-2025 09:36:43 UTC] Query: SELECT option_value FROM wp_options WHERE option_name = %s LIMIT 1
[08-Aug-2025 09:36:43 UTC] Array
(
    [0] => WPLANG
)

[08-Aug-2025 09:36:43 UTC] Array
(
    [0] => SELECT option_value FROM wp_options WHERE option_name =
    [1] =>  
    [2] => %s
    [3] =>  LIMIT 1
)

I'm pretty sure it is a hiccup. Checking what is going on. Either PHP::defineConstant, and setSiteLanguage seems pretty innocent to me.

Also, unzipFile generates an Exception at the root level when it can't download a file.

[adamziel]

Oh interesting – good find!