Array PHP traversal code for two-dimensional arrays

Initially intended to use a foreach history, but found no success, oo not pass, no way oo write ...
After the study decided to use for loop, the demo code is as follows:

Copy the Code code as follows:

$blog =array (
Array
"Titledata" = "Titlemm",
"Bodydata" = "Bodymm"
),
Array
"Titledata" = "Titlegg",
"Bodydata" = "Bodygg"
)
);
Error
foreach ($blog as $b)
{
$b [' Titledata ']= "BB";
$b [' Bodydata ']= "CC";
}
Print_r ($blog);
That's right
for ($i =0; $i
{
$blog [$i] [' Titledata ']= ' title ';
$blog [$i] [' bodydata ']= ' body ';
}
?>

The above describes the array of PHP traversal of the two-dimensional array of code, including the contents of the array, I hope to be interested in PHP tutorial friends helpful.

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