php array_walk 调试范例

本范例演示了php中如何通过array_walk调试数组，输出一个可读性良好的格式

function debug_val($val, $key='', $depth=0) {
 
    if (is_array($val)){
        // call this function again with the "sub-array":
        array_walk($val, 'debug_val', $depth+5);
    }
    else {
        // if we hit a string or bool, etc. then print it:
        print str_repeat(' ', $depth);          
        print '<span style="color: blue;">' . $key . '</span>: ';
        print var_export($val, true);
        print "<br/>\n";
    }
}
 
 
/*example-start*/
 
// setup the test array 
$array = array(
    'php', 
    'cool', 
    array('foo', 1,2,3, array('mixed' => 'bar')),
    'php' => 'array', 
    'yes' => true, 'no' => false
);
 
// debug the array
debug_val($array);
 
/*example-end*/