Promote warnings to error in array_flip()

Closes GH-4576.

Author: Girgias

ext/standard/array.c

@@ -2606,7 +2606,7 @@ PHP_FUNCTION(compact)
 }
 /* }}} */
 
-/* {{{ proto array|false array_fill(int start_key, int num, mixed val)
+/* {{{ proto array array_fill(int start_key, int num, mixed val)
    Create an array containing num elements starting with index start_key each initialized to val */
 PHP_FUNCTION(array_fill)
 {
@@ -2621,11 +2621,11 @@ PHP_FUNCTION(array_fill)
 
 	if (EXPECTED(num > 0)) {
 		if (sizeof(num) > 4 && UNEXPECTED(EXPECTED(num > 0x7fffffff))) {
-			php_error_docref(NULL, E_WARNING, "Too many elements");
-			RETURN_FALSE;
+			zend_throw_error(NULL, "Too many elements");
+			return;
 		} else if (UNEXPECTED(start_key > ZEND_LONG_MAX - num + 1)) {
-			php_error_docref(NULL, E_WARNING, "Cannot add element to the array as the next element is already occupied");
-			RETURN_FALSE;
+			zend_throw_error(NULL, "Cannot add element to the array as the next element is already occupied");
+			return;
 		} else if (EXPECTED(start_key >= 0) && EXPECTED(start_key < num)) {
 			/* create packed array */
 			Bucket *p;
@@ -2670,8 +2670,8 @@ PHP_FUNCTION(array_fill)
 	} else if (EXPECTED(num == 0)) {
 		RETURN_EMPTY_ARRAY();
 	} else {
-		php_error_docref(NULL, E_WARNING, "Number of elements can't be negative");
-		RETURN_FALSE;
+		zend_throw_error(NULL, "Number of elements can't be negative");
+		return;
 	}
 }
 /* }}} */

ext/standard/tests/array/array_fill_error.phpt

@@ -14,13 +14,18 @@ echo "*** Testing array_fill() : error conditions ***\n";
 $start_key = 0;
 $num = -1;
 $val = 1;
-var_dump( array_fill($start_key,$num,$val) );
 
-echo "Done";
+try {
+    var_dump( array_fill($start_key,$num,$val) );
+} catch (Error $e) {
+    echo $e->getMessage() . "\n";
+}
+
 ?>
+
+DONE
 --EXPECTF--
 *** Testing array_fill() : error conditions ***
+Number of elements can't be negative
 
-Warning: array_fill(): Number of elements can't be negative in %s on line %d
-bool(false)
-Done
+DONE

ext/standard/tests/array/bug61058.phpt

@@ -2,7 +2,12 @@
 Bug #61058 (array_fill leaks if start index is PHP_INT_MAX)
 --FILE--
 <?php
-array_fill(PHP_INT_MAX, 2, '*');
+
+try {
+    array_fill(PHP_INT_MAX, 2, '*');
+} catch (\Error $e) {
+    echo $e->getMessage() . "\n";
+}
 ?>
---EXPECTF--
-Warning: array_fill(): Cannot add element to the array as the next element is already occupied in %sbug61058.php on line %d
+--EXPECT--
+Cannot add element to the array as the next element is already occupied