php – 从foreach循环中删除最后一个字符

参见英文答案 > Stripping last comma from a foreach loop                                    13个
如何从生成的数字列表中删除最后一个管道？

$days = new DatePeriod(new DateTime, new DateInterval('P1D'), 6); 
foreach ($days as $day) { 
    echo strtoupper($day->format('d')+543); 
    echo "|";
}

解决方法:

1. Concat to string但添加|之前

$s = '';
foreach ($days as $day) { 
    if ($s) $s .= '|';
    $s .= strtoupper($day->format('d')+543); 
}
echo $s;

2.回声|只有不是最后一项

$n = iterator_count($days);
foreach ($days as $i => $day) { 
    echo strtoupper($day->format('d')+543);
    if (($i+1) != $n) echo '|';
}

3.加载到阵列然后内爆

$s = array();
foreach ($days as $day) { 
    $s[] = strtoupper($day->format('d')+543); 
}
echo implode('|', $s);

4. Concat to string然后切断| (或rtrim它)

$s = '';
foreach ($days as $day) { 
    $s .= strtoupper($day->format('d')+543) . '|';
}
echo substr($s, 0, -1);
# echo rtrim($s, '|');