PHP extension development - PHP uses C language to develop extensions: When the zend_parse_parameters method receives binary data, it cannot get the data?

In PHP extension development, there is a method that needs to receive binary data. zend_parse_parameters sets the parameter type to "s". When the parameters are printed, they are empty. It seems that they are not received.

<code class="c">PHP_FUNCTION(hau_socket)
{
    char *buf;
    int len;


    if( zend_parse_parameters( ZEND_NUM_ARGS() TSRMLS_CC, "s", &buf, &len) == FAILURE ) {
        return;
    }

    php_printf("str:%s, buf length:%d, len:\n", buf, strlen(buf), len);

}</code>

<code><?php

$packet = new SocketPacket();//使用pack函数打包进制数据
$packet->WriteBegin( 0x7070 );
$packet->WriteInt_N( 0x1001 );
$packet->WriteInt_N( 1 );
$packet->WriteInt_N(9055249);
$packet->WriteEnd_n();
hau_socket( $packet->GetPacketBuffer() );</code>

<code>输出结果：str:, buf length:0, len:
</code>

Is the parameter type setting incorrect? ?

Reply content:

In PHP extension development, there is a method that needs to receive binary data. zend_parse_parameters sets the parameter type to "s". When the parameters are printed, they are empty. It seems that they are not received.

<code class="c">PHP_FUNCTION(hau_socket)
{
    char *buf;
    int len;


    if( zend_parse_parameters( ZEND_NUM_ARGS() TSRMLS_CC, "s", &buf, &len) == FAILURE ) {
        return;
    }

    php_printf("str:%s, buf length:%d, len:\n", buf, strlen(buf), len);

}</code>

<code><?php

$packet = new SocketPacket();//使用pack函数打包进制数据
$packet->WriteBegin( 0x7070 );
$packet->WriteInt_N( 0x1001 );
$packet->WriteInt_N( 1 );
$packet->WriteInt_N(9055249);
$packet->WriteEnd_n();
hau_socket( $packet->GetPacketBuffer() );</code>

<code>输出结果：str:, buf length:0, len:
</code>

Is the parameter type setting incorrect? ?

No problem was found in the use of zend_parse_parameters, and you did not report a null pointer when printf, indicating that buf was indeed assigned. I think you should check if $packet->GetPacketBuffer() returns a string.