在字符串中间添加一个字符 [英] Adding a character in the middle of a string

问题描述

对此可能有一个简单的解决方案，它将导致脸红。我将时间存储为4个字符长的字符串，即1300。

There's probably a simple solution to this that will cause a facepalm. I have time stored as a 4 character long string ie 1300.

我正在尝试将该字符串显示为13:00。我觉得必须要有一个解决方案，它比我现在做的还要优雅。

I'm trying to display that string as 13:00. I feel like there has to be a solution to this that is more elegant than what I'm doing at the moment.

我目前有：

$startTime = get_field($dayStart, $post->ID);
$endTime = get_field($dayEnd, $post->ID);

        for ($x=0; $x = 4; $x++){

            if(x == 2){
                $ST .= ':';
                $ET .= ':';
            } else {
                $ST .= $startTime[x];
                $ET .= $endTime[x];
            }

        }

$startTime = $ST;
$endTime = $ET;

字符串始终为4个字符。

The string will always be 4 characters long.

推荐答案

$time = "1300";    
$time = substr($time,0,2).':'.substr($time,2,2);

编辑：

以下是此问题的一般解决方案：

Here is a general solution to this problem:

function insertAtPosition($string, $insert, $position) {
    return implode($insert, str_split($string, $position));
}

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