7.1 extension writing, output parameter remains unchanged
| From: | Jan Vávra | Date: | Wed, 19 Jul 2017 10:17:24 +0000 |
| Subject: | 7.1 extension writing, output parameter remains unchanged | ||
| Groups: | php.general | ||
| Request: | Send a blank email to php-general+get-326136@lists.php.net to get a copy of this message | ||
Hello,
I'm porting our extension from php5.6 to php7.1 x64 Windows, Visual Studio 2015.
I'd like to write an extension function that has one input / output parameter type of long. But the parameter value changed in extension is not changed in php. What I'm doing wrong?
The php code is:
$a = 3;
$r = hello_square($a);
var_export($a); echo "\n"; //value of $a still remains 3, should be 9.
The c code is:
PHP_FUNCTION(hello_square)
{
long a = 0;
zval *b;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &b) == FAILURE) {
return;} a = Z_LVAL_P(b); ZVAL_LONG(b, a*a); RETURN_BOOL(1); } ---- I also implemented hello_square this way PHP_FUNCTION(hello_square) { zend_long b; if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &b) == FAILURE) {
return;} b = b * b; RETURN_BOOL(1); } And the value of $a remains unchanged. Jan.