socket_read Reads a maximum of length bytes from a socket


socket_read

(PHP 4 >= 4.1.0, PHP 5)

socket_readReads a maximum of length bytes from a socket

说明

string socket_read ( resource $socket , int $length [, int $type = PHP_BINARY_READ ] )

The function socket_read() reads from the socket resource socket created by the socket_create() or socket_accept() functions.

参数

socket

A valid socket resource created with socket_create() or socket_accept().

length

The maximum number of bytes read is specified by the length parameter. Otherwise you can use , , or to end reading (depending on the type parameter, see below).

type

Optional type parameter is a named constant:

  • PHP_BINARY_READ (Default) - use the system recv() function. Safe for reading binary data.
  • PHP_NORMAL_READ - reading stops at or .

返回值

socket_read() returns the data as a string on success, or FALSE on error (including if the remote host has closed the connection). The error code can be retrieved with socket_last_error(). This code may be passed to socket_strerror() to get a textual representation of the error.

Note:

socket_read() returns a zero length string ("") when there is no more data to read.

更新日志

版本 说明
4.1.0 The default value for type was changed from PHP_NORMAL_READ to PHP_BINARY_READ

参见


«  socket_listen
» socket_recv
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