PHP 8 supports %h and %H in printf/sprintf

Author: ondrejmirtes

src/Php/PhpVersion.php

@@ -96,4 +96,9 @@ public function throwsTypeErrorForInternalFunctions(): bool
 		return $this->versionId >= 80000;
 	}
 
+	public function supportsHhPrintfSpecifier(): bool
+	{
+		return $this->versionId >= 80000;
+	}
+
 }

src/Rules/Functions/PrintfParametersRule.php

@@ -5,6 +5,7 @@
 use PhpParser\Node;
 use PhpParser\Node\Expr\FuncCall;
 use PHPStan\Analyser\Scope;
+use PHPStan\Php\PhpVersion;
 use PHPStan\Rules\RuleErrorBuilder;
 use PHPStan\Type\TypeUtils;
 
@@ -14,6 +15,13 @@
 class PrintfParametersRule implements \PHPStan\Rules\Rule
 {
 
+	private PhpVersion $phpVersion;
+
+	public function __construct(PhpVersion $phpVersion)
+	{
+		$this->phpVersion = $phpVersion;
+	}
+
 	public function getNodeType(): string
 	{
 		return FuncCall::class;
@@ -94,7 +102,14 @@ public function processNode(Node $node, Scope $scope): array
 
 	private function getPlaceholdersCount(string $functionName, string $format): int
 	{
-		$specifiers = in_array($functionName, ['sprintf', 'printf'], true) ? '[bcdeEfFgGosuxX]' : '(?:[cdDeEfinosuxX]|\[[^\]]+\])';
+		$specifiers = in_array($functionName, ['sprintf', 'printf'], true) ? '[bcdeEfFgGosuxX%s]' : '(?:[cdDeEfinosuxX%s]|\[[^\]]+\])';
+		$addSpecifier = '';
+		if ($this->phpVersion->supportsHhPrintfSpecifier()) {
+			$addSpecifier .= 'hH';
+		}
+
+		$specifiers = sprintf($specifiers, $addSpecifier);
+
 		$pattern = '~(?<before>%*)%(?:(?<position>\d+)\$)?[-+]?(?:[ 0]|(?:\'[^%]))?-?\d*(?:\.\d*)?' . $specifiers . '~';
 
 		$matches = \Nette\Utils\Strings::matchAll($format, $pattern, PREG_SET_ORDER);

tests/PHPStan/Rules/Functions/PrintfParametersRuleTest.php

@@ -2,6 +2,9 @@
 
 namespace PHPStan\Rules\Functions;
 
+use PHPStan\Php\PhpVersion;
+use const PHP_VERSION_ID;
+
 /**
  * @extends \PHPStan\Testing\RuleTestCase<PrintfParametersRule>
  */
@@ -10,7 +13,7 @@ class PrintfParametersRuleTest extends \PHPStan\Testing\RuleTestCase
 
 	protected function getRule(): \PHPStan\Rules\Rule
 	{
-		return new PrintfParametersRule();
+		return new PrintfParametersRule(new PhpVersion(PHP_VERSION_ID));
 	}
 
 	public function testFile(): void
@@ -91,4 +94,18 @@ public function testFile(): void
 		]);
 	}
 
+	public function testBug4717(): void
+	{
+		$errors = [
+			[
+				'Call to sprintf contains 1 placeholder, 2 values given.',
+				5,
+			],
+		];
+		if (PHP_VERSION_ID >= 80000) {
+			$errors = [];
+		}
+		$this->analyse([__DIR__ . '/data/bug-4717.php'], $errors);
+	}
+
 }

tests/PHPStan/Rules/Functions/data/bug-4717.php

@@ -0,0 +1,5 @@
+<?php
+
+$f = 4.0/3;
+$s = 'Bug';
+echo sprintf('%s qty = %h', $s, $f);