问PHP在Foreach循环中有“内置”迭代器吗？

EN

foreach( $_REQUEST as $key => $value){
    $prettyKeys = ucwords(preg_replace($patt_underscore," ",preg_replace($patt_CC,"_",$key)));
    $prettyVals = ucwords(preg_replace($patt_underscore," ",preg_replace($patt_CC,"_",$value)));
    // Replace CamelCase with Underscores, then replace the underscores with spaces and then capitalize string
    // "example_badUsageOfWhatever" ==> "Example Bad Usage Of Whatever"


    $myExcelSheet->getActiveSheet()->SetCellValue( "A". $built-in-foreach-loop-numerical-index ,$prettyKeys);
    $myExcelSheet->getActiveSheet()->SetCellValue( "B". $built-in-foreach-loop-numerical-index ,$prettyVals);
}