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--- uphp:functions:ow_write [2017/05/11 10:07]
admin created
+++ uphp:functions:ow_write [2017/05/11 22:40]
jeff
@@ Line 1: / Line 1: @@
-======ow_write======
+======array_key======
-<badge>WMPRO, WMMINI FW >= 1.0</badge> <badge>WMMEGA FW >= 2.0</badge>
+<badge>WMPRO, WMMINI FW >= 1.953</badge> <badge>WMMEGA FW >= 2.0</badge>
-Write a byte to the Onewire bus.  This is a low level function allowing custom onewire operations.
+Return the key for an <html><b><span style="color:green">array<span style="color:black"></b></html> index
 ====Description====
 <well size="sm"><html>
-<span style="font-size:125%;color:green">
+<span style="font-size:125%;color:green">string
-<span style="color:black">ow_write (
+<span style="color:black">array_key (
-<span style="color:green">$val
+<span style="color:green">array
+<span style="color:blue">$array<span style="color:black">,
+<span style="color:green">int
+<span style="color:blue">$index
 <span style="color:black">)
 </html></well>
-====Parameter====
+====Parameters====
-An <html><b><span style="color:green">int<span style="color:black"></b></html> value containing the byte to send to the onewire bus
+<html><b><span style="color:blue">$array<span style="color:black"></b>: An <b><span style="color:green">array<span style="color:black"></b> with key/value pairs</html>
+<html><b><span style="color:blue">$index<span style="color:black"></b></html>: The index for the array element (the first element is index 0)
 ====Return Values====
-none
+<html><b><span style="color:green">String<span style="color:black"></b></html> containing the key name of the array element at the specified index
 ====Example====
+===Create an array with key value pairs, iterate through the array, print out all keys and their associated values===
 <code php>
 <pre><?
+  $arr=array();
-ow_write(10);
+  $arr['name']="John";
-ow_write(11);
+  $arr['age']=30;
-ow_write(0x55);
+  $arr['status']=1;
-?>
+  for ($i=0; $i < sizeof($arr); $i++) {
+    $key=array_key($arr,$i);
+    print("Key at Index ".$i." is ".$key." and value is ".$arr[$key]."\r\n");
+  }
+?></pre>
 </code>
+The above example will output:
+<code>
+Key at Index 0 is name and value is John
+Key at Index 1 is age and value is 30
+Key at Index 2 is status and value is 1
+</code>
 ====See Also====
-[[ow_first()]] - Get the first device on the bus
+[[array()]] - Create an <html><b><span style="color:green">array<span style="color:black"></b></html>, with optional values
-[[ow_next()]] - Get next device on bus
+[[array_keys()]] - Return keys for an <html><b><span style="color:green">array<span style="color:black"></b></html> that has key/value pairs
-[[ow_read_temp()]] - Read a temperature from a device
+[[sizeof()]] - Return the number of elements in an <html><b><span style="color:green">array<span style="color:black"></b></html>
-[[ow_reset()]] - Reset the onewire bus
+[[print_r()]] - Dump the contents of an <html><b><span style="color:green">array<span style="color:black"></b></html> to the current output
-[[ow_read()]] - Read a byte from the onewire bus
+[[uphp:variables|uPHP Variable Types and Limits]]

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