Replacing Spaces with Underscores

Question

I have a PHP Script that users will enter a name like: Alex_Newton,

However, some users will use a space rather than an underscore, so my question is:

Answer 1

I used like this

$option = trim($option);
$option = str_replace(' ', '_', $option);

Answer 2

As of others have explained how to do it using str_replace, you can also use regex to achieve this.

$name = preg_replace('/\s+/', '_', $name);

Answer 3

Use str_replace function of PHP.

Something like:

$str = str_replace(' ', '_', $str);

Answer 4

$name = str_replace(' ', '_', $name);

Answer 5

str_replace - it is evident solution. But sometimes you need to know what exactly the spaces there are. I have a problem with spaces from csv file.

There were two chars but one of them was 0160 (0x0A0) and other was invisible (0x0C2)

my final solution:

$str = preg_replace('/\xC2\xA0+/', '', $str);

I found the invisible symbol from HEX viewer from mc (midnight viewer - F3 - F9)

Answer 6

Strtr replaces single characters instead of strings, so it's a good solution for this example. Supposedly strtr is faster than str_replace (but for this use case they're both immeasurably fast).

echo strtr('Alex Newton',' ','_');
//outputs: Alex_Newton