Promote warning to exception for proc_open() when null byte is encountered

GH-5004

Author: kocsismate

ext/standard/proc_open.c

@@ -401,8 +401,7 @@ static zend_string *get_valid_arg_string(zval *zv, int elem_num) {
 	}
 
 	if (strlen(ZSTR_VAL(str)) != ZSTR_LEN(str)) {
-		php_error_docref(NULL, E_WARNING,
-			"Command array element %d contains a null byte", elem_num);
+		zend_value_error("Command array element %d contains a null byte", elem_num);
 		zend_string_release(str);
 		return NULL;
 	}

ext/standard/tests/general_functions/proc_open_array.phpt

@@ -17,11 +17,19 @@ try {
     echo $exception->getMessage() . "\n";
 }
 
-echo "\nNul byte in program name:";
-var_dump(proc_open(["php\0oops"], $ds, $pipes));
+echo "\nNul byte in program name:\n";
+try {
+    proc_open(["php\0oops"], $ds, $pipes);
+} catch (ValueError $exception) {
+    echo $exception->getMessage() . "\n";
+}
 
-echo "\nNul byte in argument:";
-var_dump(proc_open(["php", "arg\0oops"], $ds, $pipes));
+echo "\nNul byte in argument:\n";
+try {
+    proc_open(["php", "arg\0oops"], $ds, $pipes);
+} catch (ValueError $exception) {
+    echo $exception->getMessage() . "\n";
+}
 
 echo "\nBasic usage:\n";
 $proc = proc_open([$php, '-r', 'echo "Hello World!\n";'], $ds, $pipes);
@@ -58,17 +66,15 @@ fpassthru($pipes[1]);
 proc_close($proc);
 
 ?>
---EXPECTF--
+--EXPECT--
 Empty command array:
 Command array must have at least one element
 
 Nul byte in program name:
-Warning: proc_open(): Command array element 1 contains a null byte in %s on line %d
-bool(false)
+Command array element 1 contains a null byte
 
 Nul byte in argument:
-Warning: proc_open(): Command array element 2 contains a null byte in %s on line %d
-bool(false)
+Command array element 2 contains a null byte
 
 Basic usage:
 Hello World!