在关联数组中动态更改值

Question

I want to replace the values of some keys dynamically at the final iteration of the foreach loop i.e. from [color] => 'grey' to [color] => 'green'.

Here is the actual script

<?php
$line = "After six months, participants in both vitamin D supplementation groups had lost more weight and had greater reductions in their waistlines than those who hadn't taken the supplements, Vigna's team said";
// $chunks = str_split($line, 35);
$array = explode("
", wordwrap($line, 40, "
"));
// echo '<pre>' . print_r($chunks, true);

    function splitTextString($array) 
    {
         foreach($array as $key=>$value) 
         {
            $linesArr{$key}['name'] = $value;
            $linesArr{$key}['font-size'] = 27;
            $linesArr{$key}['color'] = "grey";
        }
                return $linesArr;
    }


    echo "<pre>";
    print_r(splitTextString($array));
    echo "</pre>";
?> 

Answer 1

Just change the string in the last iteration

<?php

    $line  = "After six months ...";
    $array = explode("
", wordwrap($line, 40, "
"));

    function splitTextString($array) {

         end($array);
         $last = key($array);
         reset($array);

         foreach($array as $key=>$value) {

            $color = $key === $last ? "green" : "grey";

            $linesArr{$key}['name'] = $value;
            $linesArr{$key}['font-size'] = 27;
            $linesArr{$key}['color'] = $color;
        }

        return $linesArr;
    }

    echo "<pre>";
    print_r(splitTextString($array));
    echo "</pre>";
?>