The php Function Socket_Set_Blocking

The php function socket_set_blocking allows you to set the socket to either blocking or non-blocking mode. When the socket is set to blocking mode, all calls that read from the socket (such as fgets()) will wait for data to become available on the socket before returning. When the socket is set to non-blocking mode, these functions will return immediately.

To get started, first, you need to create a valid socket resource using the socket_create() function. Once the socket is created, you can use the function socket_set_blocking() to switch it to the desired mode. This function is an alias for the stream_set_blocking() function and works with any type of stream, including socket streams.

When the socket_set_blocking() function is called, the O_NONBLOCK flag is removed from the socket. This means that all calls to the socket (recv, send, connect, etc) will block until there is a response or the socket can perform the operation.

This function returns the number of bytes received in buf, or FALSE if there was an error. The actual error code may be retrieved by calling socket_last_error, or the function can return an empty string if no error occurs.

The get_resources() function is an inbuilt function in PHP that returns active resources in an array form. It can be used to find out the status of an application and to check whether the resources are available. It supports filtering by the resource type, if the parameter is specified. The function is a good alternative to the get_status() function, which only returns status for a single resource at a time.