preg_match正则表达式拆分firstname，lastname

I can't seem to figure this out... and I admit I'm not up to date with the new stuff. I was using eregi_replace, but switched it to preg_replace and added the delimiter. Now it is not working correctly.

I have fields that are in a form, that are sent to a form validator, and the error message lets the user know which fields are missing; i.e. "firstname, lastname, password, etc.". The error needs to show as "First Name or Last Name", basically adding a space and capitalizing the N in Name.

Can someone point out what I'm doing wrong?

This is what used to work:

$r .= ucwords(eregi_replace("_", " ", $c));

This is what I changed it to:

$r .= ucwords(preg_replace("/_/", " ", $c));

Now they just show as Firstname, Lastname but I would like them to show as First Name, Last Name.

Hello it might be working like this:

<?php

$c = array('Firstname', 'Lastname', 'password');

foreach($c as $field_name)
{
    $r = ucwords(preg_replace("/name/i", " Name", $field_name));

    echo $r."<br>"; 
}

Your question and code didn't demonstrate what you were after.

$r .= ucwords(eregi_replace("_", " ", $c));

Never would have found name, that is looking for an underscore and replacing it with a space.

Which is why

preg_replace("/_/", " ", $c);

didn't work for you. That is a correct conversion but the regex is solving the wrong problem. Given the answer above another approach you could've, since a regex isn't needed, would be str_ireplace.

$c = array('Firstname', 'Lastname', 'password');
foreach($c as $field_name) {
    $r = ucwords(str_ireplace("name", " Name", $field_name));
    echo $r."
";
}

Demo: https://eval.in/452283