ArcanistLowercaseFunctionsXHPASTLinterRule.php
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ArcanistLowercaseFunctionsXHPASTLinterRule.php
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	<?php

	final class ArcanistLowercaseFunctionsXHPASTLinterRule
	extends ArcanistXHPASTLinterRule {

	const ID = 61;

	public function getLintName() {
	return pht('Lowercase Functions');
	}

	public function getLintSeverity() {
	return ArcanistLintSeverity::SEVERITY_ADVICE;
	}

	public function process(XHPASTNode $root) {
	static $builtin_functions = null;

	if ($builtin_functions === null) {
	$builtin_functions = array_fuse(
	idx(get_defined_functions(), 'internal', array()));
	}

	$function_calls = $root->selectDescendantsOfType('n_FUNCTION_CALL');

	foreach ($function_calls as $function_call) {
	$function = $function_call->getChildByIndex(0);

	if ($function->getTypeName() != 'n_SYMBOL_NAME') {
	continue;
	}

	$function_name = $function->getConcreteString();

	if (!idx($builtin_functions, strtolower($function_name))) {
	continue;
	}

	if ($function_name != strtolower($function_name)) {
	$this->raiseLintAtNode(
	$function,
	pht('Calls to built-in PHP functions should be lowercase.'),
	strtolower($function_name));
	}
	}
	}

	}