How would I go about grabbing the last 7 characters of the string below?
For example:
$dynamicstring = "2490slkj409slk5409els";
$newstring = some_function($dynamicstring);
echo "The new string is: " . $newstring;
Which would display:
The new string is: 5409els
Use substr() with a negative number for the 2nd argument.
$newstring = substr($dynamicstring, -7);
From the php docs:
string substr ( string $string , int $start [, int $length ] )If start is negative, the returned string will start at the start'th character from the end of string.
umh.. like that?
$newstring = substr($dynamicstring, -7);
It would be better to have a check before getting the string.
$newstring = substr($dynamicstring, -7);
if characters are greater then 7 return last 7 characters else return the provided string.
or do this if you need to return message or error if length is less then 7
$newstring = (strlen($dynamicstring)>7)?substr($dynamicstring, -7):"message";
Safer results for working with multibyte character codes, allways use mb_substr instead substr. Example for utf-8:
$str = 'Ne zaman seni düşünsem';
echo substr( $str, -7 ) . ' <strong>is not equal to</strong> ' .
mb_substr( $str, -7, null, 'UTF-8') ;
For simplicity, if you do not want send a message, try this
$new_string = substr( $dynamicstring, -min( strlen( $dynamicstring ), 7 ) );
for last 7 characters
$newstring = substr($dynamicstring, -7);
$newstring : 5409els
for first 7 characters
$newstring = substr($dynamicstring, 0, 7);
$newstring : 2490slk