Remove everything after a character in PHP

Question

can any tell how to remove characters after ? in php. I have one string test?=new i need to remove the characters as well as = from that string.

Answer 1

Use the strstr function.

<?php
$myString = "test?=new";
$result = strstr($myString, '=', true);

echo $result ;

The third parameter true tells the function to return everything before the first occurrence of the second parameter.

Answer 2

This solution uses a simple regular expression to remove the ? character and all characters following it.

$string = "test?p=new";
$new_string = preg_replace("/\?.+/", "", $string);

Answer 3

Shortest one:

echo strtok('test?=new', '?');

If you want to keep the question mark, the solution is almost the same:

echo strtok('test?=new', '?').'?';

Answer 4

You can do this with a well-written regex, but the much simpler and quicker way to do it is to explode the string on the "?" character, and use the first element in the resulting array.

$str = "test?=new";
$str2 = explode("?", $str);
$use_this = $str2[0];

$use_this[0] will be "test". If you want to add the "?" back, just concatenate:

$use_this = $use_this."?";

Answer 5

substr and strpos

The simplest way to do this is with substr() DOCs and strpos() DOCs.

$string = 'test?=new';
$cut_position = strpos($string, '?') + 1; // remove the +1 if you don't want the ? included
$string = substr($string, 0, $cut_position);

As you can see substr() extracts a sub-string from a string by index and strpos() returns the index of the first instance of the character it is searching for (in this case ?).

Answer 6

You could always try using preg_replace() as well:

$string = 'test?q=new';
$result = preg_replace("/\?.+/", "", $string);

If, for some reason, you are wanting to keep the ? in the result... you could also do this:

$string = 'test?q=new';
$result = preg_replace("/\?.+/", "?", $string);

(or, you could use a positive look-behind assertion, as @BlueJ774 suggested,) like this:

$result = preg_replace("/(?<=\?).+/", "", $string);

But ideally, and for future reference, if you are working with a query string, you probably will want to use parse_str at some point, like this:

$string = 'test?q=new';
parse_str($string, $output);

Because that will give you an array ($output, in this case,) with which to work with all of the parts of the query string, like this:

Array
(
    [test?q] => new
)

But normally... you would probably just want to be working with the query string by this point... so the output would be more like this:

Array
(
    [q] => new
)