create a contiguous subarray lambda

subarrays.php

<?php

function create_csl($length = 3,$comparison_operator = '>')
{
    $fn = '';
    $i = 0;
    while(true)
    {
        if($i == 0)
        {
            $fn.='return ( (bool) ';
        } 
        
        $fn .= '$a['.$i.'] '.$comparison_operator.' $a['. ($i+1) .']';
        
        if($length > 1)
        {
            $fn.= ' && ';
        }
        
        if($length == 1)
        {
            $fn.=' );';
            break;
        }
        
        $length--;
        $i++;
    }
    return create_function('$a',$fn);
}