More precise string-containing functions

Author: staabm

src/Type/Php/StrContainingTypeSpecifyingExtension.php

@@ -66,7 +66,7 @@ public function specifyTypes(FunctionReflection $functionReflection, FuncCall $n
 			[$hackstackArg, $needleArg] = self::STR_CONTAINING_FUNCTIONS[strtolower($functionReflection->getName())];
 
 			$haystackType = $scope->getType($args[$hackstackArg]->value);
-			$needleType = $scope->getType($args[$needleArg]->value);
+			$needleType = $scope->getType($args[$needleArg]->value)->toString();
 
 			if ($needleType->isNonEmptyString()->yes() && $haystackType->isString()->yes()) {
 				$accessories = [

tests/PHPStan/Analyser/nsrt/implode.php

@@ -61,6 +61,6 @@ public function constArrays5($constArr) {
 
 	/** @param array{0: 1, 1: 'a'|'b', 3?: 'c'|'d', 4?: 'e'|'f', 5?: 'g'|'h', 6?: 'x'|'y'} $constArr */
 	public function constArrays6($constArr) {
-		assertType("string", implode('', $constArr));
+		assertType("literal-string&lowercase-string&non-falsy-string", implode('', $constArr));
 	}
 }

tests/PHPStan/Analyser/nsrt/non-empty-string-str-containing-fns.php

@@ -14,6 +14,16 @@ class Foo {
 	 */
 	public function strContains(string $s, string $s2, $nonES, $nonFalsy, $numS, $literalS, $nonEAndNumericS, int $i): void
 	{
+		if (str_contains($i, 0)) {
+			assertType('int', $i);
+		}
+		if (str_contains($s, 0)) {
+			assertType('non-empty-string', $s);
+		}
+		if (str_contains($s, 1)) {
+			assertType('non-falsy-string', $s);
+		}
+
 		if (str_contains($s, ':')) {
 			assertType('non-falsy-string', $s);
 		}