How to remove part of a string?

Question

How to trim a part of a string, and save it in a particular string in MySQL using PHP?

Example:

If a string has the value "REGISTER 11223344 here"

How can I cut "11223344" from the string?

Answer 1

assuming 11223344 is not constant

$string="REGISTER 11223344 here";
$s = explode(" ",$string);
unset($s[1]);
$s = implode(" ",$s);
print "$s\n";

Answer 2

If you're specifically targetting "11223344", then use str_replace:

echo str_replace("11223344", "", "REGISTER 11223344 here");

Answer 3

Do the following

$string = 'REGISTER 11223344 here';

$content = preg_replace('/REGISTER(.*)here/','',$string);

This would return "REGISTERhere"

or

$string = 'REGISTER 11223344 here';

$content = preg_replace('/REGISTER (.*) here/','',$string);

This would return "REGISTER here"

Answer 4

substr() is a built-in php function which returns part of a string. The function substr() will take a string as input, the index form where you want the string to be trimmed. and an optional parameter is the length of the substring. You can see proper documentation and example code on http://php.net/manual/en/function.substr.php

NOTE : index for a string starts with 0.

Answer 5

You can use str_replace, which is defined as:

str_replace  ( $search  , $replace  , $subject )

So you can write the code as:

$subject = "REGISTER 11223344 here";
$search = "11223344"
$trimmed = str_replace($search, "", $subject);
echo $trimmed

For the full reference check: http://php.net/manual/en/function.str-replace.php

Answer 6

When you need rule based matching, you need to use regex

$string = "REGISTER 11223344 here";
preg_match("/(\d+)/", $string, $match);
$number = $match[1];

That will match the first set of numbers, so if you need to be more specific try:

$string = "REGISTER 11223344 here";
preg_match("/REGISTER (\d+) here/", $string, $match);
$number = $match[1];