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--- uphp:functions:fseek [2017/03/31 12:14]
jeff created
+++ uphp:functions:fseek [2021/09/13 05:57] (current)
@@ Line 1: / Line 1: @@
 ======fseek======
 <badge>WMPRO, WMMINI FW >= 1.0</badge> <badge>WMMEGA FW >= 2.0</badge>
@@ Line 6: / Line 7: @@
 ====Description====
-<well size="sm"><html><span style="font-size:125%"></html>[[fseek]]
+<well size="sm"><html>
-<html>(
+<span style="font-size:125%">fseek (
-<span style="color:green;">int
+<span style="color:green">int
-<span style="color:blue;">$handle<span style="color:black;">,
+<span style="color:blue">$handle<span style="color:black">,
-<span style="color:green;">int
+<span style="color:green">int
-<span style="color:blue;">$offset<span style="color:black;">,
+<span style="color:blue">$offset<span style="color:black">,
-<span style="color:green;">int
+<span style="color:green">int
-<span style="color:blue;">$whence
+<span style="color:blue">$whence
-<span style="color:black;">)
+<span style="color:black">)
 </html></well>
@@ Line 21: / Line 22: @@
 ====Parameters====
-<html><span style="color:blue;"><b>$handle</b><span style="color:black;"></html>:  Valid handle of a previously opened resource
+<html><b><span style="color:blue">$handle<span style="color:black"></b></html>:  Valid handle of a previously opened file
-<html><span style="color:blue;"><b>$offset</b><span style="color:black;"></html>:  How far to move the pointer (bytes)
+<html><b><span style="color:blue">$offset<span style="color:black"></b></html>:  How far to move the pointer (bytes)
-<html><span style="color:blue;"><b>$whence</b><span style="color:black;"></html>:  Seek type, starting position option, from where to move the pointer:
+<html><b><span style="color:blue">$whence<span style="color:black"></b></html>:  Seek type, starting position option, from where to move the pointer:
   * **0** - Seek from the **start of the file**
-  * **1** - Seek from the **current position**
+  * **1** - Seek from the **current position** (<html>a positive <b><span style="color:blue">offset<span style="color:black"></b> will move forward, and a negative <b><span style="color:blue">offset<span style="color:black"></b> will move in reverse</html>)
-  * **2** - Seek from the **end of the file** (in reverse)
+  * **2** - Seek from the **end of the file** (in reverse)((<html>When using <b><span style="color:blue">whence<span style="color:black"></b>=2 to seek from the end of the file a positive <b><span style="color:blue">offset<span style="color:black"></b> is used to move in reverse.</html>))
 ====Return Values====
 None
 ====Example====
 <code php>
 <?
@@ Line 53: / Line 56: @@
 [[fopen()]] - Open a file for reading or writing
-[[fread()]] - Return bytes from a file or stream
+[[fseropen()]] - Open the serial port at the specified baud rate with optional parameters
+[[f485open()]] - Open the RS-485 port at the specified baud rate and parity
+[[fsockopen()]] - Open an internet socket connection with optional timeout
+[[fread()]] - Read bytes from a file, stream or socket
+[[fgets()]] - Return a single line from a file, stream or socket, with optional size limit
+[[fwrite()]] - Write data to a file, stream or socket
+[[feof()]] - Test if no more data is available in a file, stream or socket
-[[fgets()]] - Return a single line from a file or stream, with optional size limit
+[[filesize()]] - Return the size of a file, or the number of unread bytes in a stream or socket
-[[fwrite()]] - Write data to a file or stream
+[[ftell()]] - Return the current position of a file read/write pointer
 [[fclose()]] - Close a file, stream or socket

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