[RESOLVED] What does "=>" do ?

I have seen this line:

Code:

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foreach($result as $key=>$val)

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I know that, to access a Class object's datamembers or methods, we would be using "->" . But what does this "=>" means ? :confused:

Thanks :wave:

isn't it a separator used in associative arrays? :confused:
i find so, after google it.
i mean:

Code:

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<?php
$ages = array("Peter"=>32, "Quagmire"=>30, "Joe"=>34);
foreach($ages as $key=>$val)
{
        echo $key;
}
?>

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Thanks :)

:wave:

It's not specifically used for associative arrays, but simply for describing a key (or index) and value pair. It's also used in the foreach statement. Here are some examples:

PHP Code:

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// Associative array representing one book:
// In this case, the key represents a field of data, and the value represents the field's value
$book = array(
  "author" => "Richard Dawkins",
  "title" => "The God Delusion",
  "isbn" => "0618680004",
  "year" => 2006
);

// Numeric array representing multiple books
// In this case, the key represents a book ID, and the value represents the book
$books = array(
  0 => $book,
);

// Foreach
foreach($books as $index => $book){
  echo "On book #{$index} in collection.\r\n";
  echo "Book data:\r\n";
  foreach($book as $key => $value){
    echo "{$key}: {$value}\r\n";
  }
} 


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Thanks :wave: