使用php [duplicate]避免textarea中的空白行

Question

This question already has an answer here:

• Removing blank lines from a textarea's output 3 answers

I am using below php code to process two textareas called namelist and placelist and echo it to html.

<?php

$namelist = $_POST['namelist'];
$placelist = $_POST['placelist'];

$names = explode("
", $namelist); 
$places = explode("
", $placelist); 

$entries = min(count($names), count($places));

for ($i = 0; $i < $entries; $i++) {
$name  = trim($names[$i]); 
$place = trim($places[$i]);
echo "My name is $name and I am from $place ".PHP_EOL;
}

?>

But above code processing the blank lines in my textareas ? I need to avoid blank lines from echoing. for example, if the namelist contains

Tom
George

and placelist contains

GK
US

I will get output like:

My name is Tom and I am from GK 
My name is George and I am from US

But If there is a blank line in an of the textarea it processing the blank line too. eg:

Tom
George

and

GK

US

It will give below output like

My name is Tom and I am from GK 
My name is George and I am from

</div>

Answer 1

Try this:

Using regex to eliminate blank lines before exploding (works well for any number of consecutive blank lines)

$name = preg_replace('/
+/', "
", trim($_POST['namelist']));
$place = preg_replace('/
+/', "
", trim($_POST['placelist']));