如何从字符串中删除完全匹配？

How i can replace/remove exact match word from string, an example string

$string = 'Hello world, command data test com';

How to remove com ( exact match from the string ) but to don't remove the com from command to

You need to use preg_replace. Basically preg_replace() searches the subject for pattern matches and replaces them with the replacement.

<?php
   $string = 'Hello world, command data test com';
   $string = preg_replace('/\bcom\b/', '', $string);
   echo $string;
?>

Explanation: Above example pattern is explained below

\b: Match a word boundary.
com: Text to match.

For more Special Character Definitions check this

Short version:

join(' ',array_diff(explode(' ', $string), ['com']));

Explanation:

• explode(' ', $string) splits your string into an array of words
• array_diff($words, ['com']) removes the elements on the second array from the first array. So in case the array of $words contains the word com, it will be removed
• join(' ', $words) concats all the strings in the $words array, dividing each word from each other with a space.

Full snippet:

<?php
$string = 'Hello world, command data test com';
$words = explode(' ', $string);
$words = array_diff($words, ['com']);
$string = join(' ', $words);

Another version.... If your input string alway in this order You can do it with rtrim

Snippet

$string = 'Hello world, command data test com';
$string = rtrim($string, ' com');
echo $string;

Output

Hello world, command data test

Live demo

Docs rtrim