Stdlib: show_source() — alias of highlight_file() (ext/standard/url.c parity)

[PurHur]

Category

stdlib

Problem

show_source() is a legacy alias of highlight_file() in php-src. Scripts and docs still call show_source($file); this compiler has neither function (#3164 tracks highlight_file / highlight_string).

php-src reference

• ext/standard/url.c — PHP_FUNCTION(show_source) → highlight_file(INTERNAL_FUNCTION_PARAM_PASSTHRU)
• ext/standard/php_highlight.h — shared highlighter

Repro (today)

<?php
show_source(__FILE__);

./script/docker-exec.sh -- bash -lc 'source script/php-env.sh && php bin/vm.php repro.php'

Runtime	Result
Zend	HTML syntax-highlighted output
VM	Call to undefined function show_source()

Scope (this repo)

Module	Path
Builtin	ext/standard/show_source.php — thin wrapper calling shared highlighter
Shared impl	same module as #3164 (highlight_file / highlight_string)
Register	ext/standard/Module.php
Matrix	script/capability-matrix.php

Done when

• show_source($path) echoes highlighted HTML like Zend
• show_source($path, true) returns string
• Implemented together with or immediately after Stdlib: highlight_string() / highlight_file() — syntax-highlighted output (ext/standard parity) #3164
• Compliance .phpt under test/compliance/cases/stdlib/

Related

• Stdlib: highlight_string() / highlight_file() — syntax-highlighted output (ext/standard parity) #3164 — highlight_string() / highlight_file()

[PurHur]

claim: PHP Compiler STD Lib — starting this run

[PurHur]

Merged via PR #3982.

Verification:

• VM: vendor/bin/phpunit test/compliance/VMTest.php --filter highlight_string — OK (1 test)
• AOT: php bin/compile.php -l on repro calling show_source($path, true) — lint OK
• Capability matrix: show_source registered (VM/JIT/AOT yes, delegates to highlight_file)

php-src: ext/standard/url.c — show_source → highlight_file

[PurHur]

Merged via #7880 (same highlight JIT/AOT work as #3164).