Revision as of 20:19, 11 August 2014

Foreach As Key Value

Description

Loop based on an expression.

foreach( <expression> as <key> => <value> )
{
    statements
    ...
}
foreach( <expression> as <key> => <value> from <offset> )
{
    statements
    ...
}
foreach( <expression> as <key> => <value> from <start> to <end> )
{
    statements
    ...
}

Parameters

expression

An expression needs to be an array for this loop to happen.

key

The variable to place the key in most common as a $variable.

value

The variable to place the value in most common as a $variable.

Remarks

Foreach...As..Key..Value statements may be nested.

Example

Here we cycle through binary data :

$var = array(
		"One" => 100,
		"Two" => 200,
		"Three" => 300
		);
 
Foreach ($var as $key => $value)
{
	println( "Key '$key' | Value '$value'" );
}

A reverse foreach

$var = array(
		"One" => 100,
		"Two" => 200,
		"Three" => 300
		);
 
println( "Key '$key' | Value '$value'" ) Foreach ($var as $key => $value);

Using from

$var = array(
		"One" => 100,
		"Two" => 200,
		"Three" => 300,
		"Four" => 300
		);
 
Foreach ($var as $key => $value from 1)
{
	println( "Key '$key' | Value '$value'" );
}

Using from and to

$var = array(
		"One" => 100,
		"Two" => 200,
		"Three" => 300,
		"Four" => 300
		);
 
Foreach ($var as $key => $value from 1 to 2)
{
	println( "Key '$key' | Value '$value'" );
}