Req #74449 [NEW]: Check string begins with function: str_begins()
From: stanislav dot eckert at vizson dot de
Operating system:
PHP version: Irrelevant
Package: Strings related
Bug Type: Feature/Change Request
Bug description:Check string begins with function: str_begins()
Description:
------------
A quite often used code is to check if a string / binary string begins
with a certain substring. Using substr() requires setting 2nd param
always to 0 and 3rd param to length, which is the often set hardcoded or
with strlen() / mb_strlen(). Example:
substr($str, 0, 7) == "http://"
// or
substr($str, 0, strlen("http://")) == "http://"
This can lead to errors, when user sets wrong length, mixes substr() &
strlen() with their multibyte versions, etc. A shorter version could be
done with strpos() and checking for position 0, but strpos() searches
the entire string. RegEx has performance implications.
A simple function would result in a cleaner and a more robust and
readable code. Example:
str_begins($str, $substr) // => true / false
Its performance can also be optimized quite good, I think (compared to
substr()).
--
Edit bug report at https://bugs.php.net/bug.php?id=74449&edit=1
--
Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=74449&r=trysnapshot54
Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=74449&r=trysnapshot55
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=74449&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=74449&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=74449&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=74449&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=74449&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=74449&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=74449&r=support
Expected behavior: https://bugs.php.net/fix.php?id=74449&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=74449&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=74449&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=74449&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=74449&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=74449&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=74449&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=74449&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=74449&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=74449&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=74449&r=mysqlcfg
Thread (4 messages)
- stanislav dot eckert at vizson dot de