What are common methods in PHP to manipulate strings, such as removing specific substrings like in the given example?

To remove specific substrings from a string in PHP, you can use functions like `str_replace`, `preg_replace`, or `substr_replace`. These functions allow you to replace or remove specific substrings based on patterns or positions within the string. In the given example, we can use `str_replace` to remove the substring "world" from the input string. 

$input = "Hello, world!";
$substring = "world";
$output = str_replace($substring, "", $input);

echo $output; // Output: Hello, !

Keywords

PHP string manipulation substrings str_replace preg_replace

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