Delete words in a string within variable

Question

I could use some help. How can I delete words in a string within variable? For Example:

$var = "test1 test2 ui"; $string="fru test1 frhu test2 vrui ui fehugr";

The output should be:

fru fru vrui fehugr

Thanks in advance for your help!

Answer 1

@xdazz, unfortunately, your code does not return the requested output.

Since Filippo only wants to replace /real/ words, that starts with nothing/whitespace and ends with whitespace/new-line/nothing, you need a regular expression for it.

$exp = '/(^|\s)('.str_replace(' ', '|', preg_quote($var, '/')).')(?=(\s|$))/';
$string = trim(preg_replace($exp, '', $string));

This replaces only real words.

Answer 2

Use the str_replace function:

$ret = str_replace(explode(' ', $var), '', $string);