Extract a substring between two characters in a string PHP - php

Question

Is there a PHP function that can extract a phrase between 2 different characters in a string? Something like substr();
Example:
$String = "[modid=256]";
$First = "=";
$Second = "]";
$id = substr($string, $First, $Second);
Thus $id would be 256
Any help would be appreciated :)

Answer 1

use this code
$input = "[modid=256]";
preg_match('~=(.*?)]~', $input, $output);
echo $output[1]; // 256
working example http://codepad.viper-7.com/0eD2ns

Answer 2

Use:
<?php
$str = "[modid=256]";
$from = "=";
$to = "]";
echo getStringBetween($str,$from,$to);
function getStringBetween($str,$from,$to)
{
$sub = substr($str, strpos($str,$from)+strlen($from),strlen($str));
return substr($sub,0,strpos($sub,$to));
}
?>

Answer 3

$String = "[modid=256]";
$First = "=";
$Second = "]";
$Firstpos=strpos($String, $First);
$Secondpos=strpos($String, $Second);
$id = substr($String , $Firstpos, $Secondpos);

Answer 4

If you don't want to use reqular expresion, use strstr, trim and strrev functions:
// Require PHP 5.3 and higher
$id = trim(strstr(strstr($String, '='), ']', true), '=]');
// Any PHP version
$id = trim(strrev(strstr(strrev((strstr($String, '='))), ']')), '=]');

Answer 5

Regular Expression is your friend.
preg_match("/=(\d+)\]/", $String, $matches);
var_dump($matches);
This will match any number, for other values you will have to adapt it.

Answer 6

You can use a regular expression:
<?php
$string = "[modid=256][modid=345]";
preg_match_all("/\[modid=([0-9]+)\]/", $string, $matches);
$modids = $matches[1];
foreach( $modids as $modid )
echo "$modid\n";
http://eval.in/9913

Answer 7

$str = "[modid=256]";
preg_match('/\[modid=(?P<modId>\d+)\]/', $str, $matches);
echo $matches['modId'];

Answer 8

I think this is the way to get your string:
<?php
function get_string_between($string, $start, $end){
$string = ' ' . $string;
$ini = strpos($string, $start);
if ($ini == 0) return '';
$ini += strlen($start);
$len = strpos($string, $end, $ini) - $ini;
return substr($string, $ini, $len);
}
$fullstring = '.layout {
color: {{ base_color }}
}
li {
color: {{ sub_color }}
}
.text {
color: {{ txt_color }}
}
.btn {
color: {{ btn_color }}
}
.more_text{
color:{{more_color}}
}';
$parsed = get_string_between($fullstring, '{{', '}}');
echo $parsed;
?>

Answer 9

(moved from comment because formating is easier here)
might be a lazy approach, but in such cases i usually would first explode my string like this:
$string_array = explode("=",$String);
and in a second step i would get rid of that "]" maybe through rtrim:
$id = rtrim($string_array[1], "]");
...but this will only work if the structure is always exactly the same...
-cheers-
ps: shouldn't it actually be $String = "[modid=256]"; ?

Answer 10

Try Regular Expression
$String =" [modid=256]";
$result=preg_match_all('/(?<=(=))(\d+)/',$String,$matches);
print_r($matches[0]);
Output
Array ( [0] => 256 )
DEMO
Explanation
Here its used the Positive Look behind (?<=)in regular expression
eg (?<=foo)bar matches bar when preceded by foo,
here (?<=(=))(\d+) we match the (\d+) just after the '=' sign.
\d Matches any digit character (0-9).
+ Matches 1 or more of the preceeding token

Answer 11

You can use a regular expression or you can try this:
$String = "[modid=256]";
$First = "=";
$Second = "]";
$posFirst = strpos($String, $First); //Only return first match
$posSecond = strpos($String, $Second); //Only return first match
if($posFirst !== false && $posSecond !== false && $posFirst < $posSecond){
$id = substr($string, $First, $Second);
}else{
//Not match $First or $Second
}
You should read about substr. The best way for this is a regular expression.