php 换行符分割

$text = "Line 1\nLine 2\nLine 3";
$lines = explode("\n", $text);

foreach ($lines as $line) {
    echo $line . "<br>";
}

$text = "Line 1\nLine 2\r\nLine 3";
$lines = preg_split('/\r?\n/', $text);

foreach ($lines as $line) {
    echo $line . "<br>";
}

$text = "Line 1\r\nLine 2\nLine 3";
$text = str_replace("\r\n", "\n", $text);
$lines = explode("\n", $text);

foreach ($lines as $line) {
    echo $line . "<br>";
}

$text = "Line 1\r\nLine 2\nLine 3";
$lines = preg_split('/\r?\n/', $text);

foreach ($lines as $line) {
    echo $line . "<br>";
}

$text = "Line 1\r\nLine 2\nLine 3";
$text = str_replace("\r\n", "\n", $text);
$lines = explode("\n", $text);

foreach ($lines as $line) {
    echo $line . "<br>";
}