PHP - 用空格分隔字符并删除之前和之后的所有内容

Question

I have a little issue and I don't know how to call it :D So I want to (simply) remove everything before and after character separated by space. For example:

Input: "Hello holy world"
Key: "ho" or "hol" etc.
Output: "holy"

or

Input: "testing text"
Key: "tex"
Output: "text"

Answer 1

Your not removing so much as searching and displaying the match.

$search ='ho';
$str='Hello holy world';


preg_match("/\w*$search\w*/", $str,$out);

print_r($out);

Array
(
    [0] => holy
)

\w* matches any word character (equal to [a-zA-Z0-9_])

demo:https://regex101.com/r/iX3nF6/22 lets you experiment with other strings\options