stripcslashes
The mail validator example is NON CONFORMANT with SMTP mail RFCs. Valid characters for Internet e-mail address are more than the ones listed here. Implementing such lame validator is a big disservice to the whole Internet.
Those interested can read RFC 5322. In short, the valid characters are different on both sides of the @ sign, so, before applying this fast technique the address should be exploded into the two side strings, and then, use different valid character strings for the local-part and the domain.
A local part can be any alphabetic or digit US-ASCII character plus "!#$%&'*+-/=?^_`{|}~", and then, if it is enclosed in double-quotes ("), it can be any US-ASCII character except double-quote (") and back-slash(\).
The domain can be any printable US-ASCII characters not including "[", "]", or "\".
And then, this could be overridden with the advent of internationalized domains, that can use UTF-8 character sets.
Implementation of the validator is left as an exercise for the reader.
stripos
(PHP 5)
stripos — Findet das erste Vorkommen eines Strings, unabhängig von Groß- und Kleinschreibung
Beschreibung
int stripos
( string $haystack
, string $needle
[, int $offset = 0
] )
Gibt die numerische Position des ersten Vorkommens von needle innerhalb des Strings haystack zurück.
Im Gegensatz zu strpos() ist stripos() unabhängig von Groß- und Kleinschreibung.
Parameter-Liste
- haystack
-
Die Zeichenkette, in der gesucht werden soll.
- needle
-
Beachten Sie, dass needle eine Zeichenkette von einem oder mehreren Zeichen sein kann.
Ist needle kein String, wird der Parameter in einen Integerwert konvertiert, der dem Ordinalwert des Zeichens entspricht.
- offset
-
Der optionale Parameter offset erlaubt Ihnen anzugeben, ab welchem Zeichen in haystack die Suche begonnen werden soll. Die zurückgegebene Position bezieht sich jedoch auf den Anfang von haystack .
Rückgabewerte
Wenn needle nicht gefunden wird, gibt stripos() den boolean-Wert FALSE zurück.
Warnung
Diese Funktion kann sowohl das boolsche FALSE zurückliefern, als auch einen nicht-boolschen Wert, wie zum Beispiel 0 oder "", der von einem einfachen if-Statement als FALSE ausgewertet wird. Weitere Informationen entnehmen Sie bitte dem Abschnitt über die boolschen Typen. Benutzen Sie deshalb den === Operator, um den Rückgabewert dieser Funktion zu überprüfen.
Beispiele
Beispiel #1 stripos()-Beispiele
<?php
$findmich = 'a';
$meinstring1 = 'xyz';
$meinstring2 = 'ABC';
$pos1 = stripos($meinstring1, $findmich);
$pos2 = stripos($meinstring2, $findmich);
// 'a' ist natürlich nicht in 'xyz' enthalten
if ($pos1 === false) {
echo "Die Zeichenkette '$findmich' kommt nicht im String '$meinstring1' vor.";
}
// Beachten Sie die Verwendung von ===. Ein einfaches == funktioniert nicht wie
// erwartet, da 'a' an Position 0 (also erster!) Stelle steht
if ($pos2 !== false) {
echo "Die Zeichenkette '$findmich' wurde in '$meinstring2' an Position $pos2 gefunden";
}
?>
Anmerkungen
Hinweis: Diese Funktion ist binary safe.
Siehe auch
- strpos() - Sucht das erste Vorkommen des Suchstrings
- strrpos() - Findet das letzte Vorkommen eines Zeichens innerhalb einer Zeichenkette
- strrchr() - Sucht das letzte Vorkommen eines Zeichens in einem String
- substr() - Gibt einen Teil eines Strings zurück
- stristr() - Wie strstr, aber unabhängig von Groß- bzw. Kleinschreibung
- strstr() - Findet das erste Vorkommen eines Strings
- strripos() - Findet das letzte Vorkommen der gesuchten Zeichenkette in einem String, unabhängig von Groß- und Kleinschreibung
- str_ireplace() - Groß- und kleinschreibungsunabhängige Version von str_replace
add a note
User Contributed Notesstripos
vgiralt
19-Aug-2009 11:38
19-Aug-2009 11:38
manualregexp
18-May-2009 12:52
18-May-2009 12:52
Fast email validator using stripos to check for valid characters.
<?php
function validate_email($value) {
$chars="ABCDEFGHIJKLMNOPQRSTUVWXYZ".
"abcdefghijklmnopqrstuvwxyz0123456789@._";
$at=0; /* at sign */
$dot=0; /* dot after at */
$end_pos = strlen($value)-1;
for ($i=0;$i<strlen($value);$i++) {
$c = $value[$i];
if (stripos($chars, $c)===false) return false;
if ($c=="@") $at++;
if ($at==1 && $c==".") $dot++;
if ($at>1) return false;
/* Don't start or end with an '@' or a '.'
* No @'s or .'s next to each other.
*/
if (($c=="." || $c=="@") &&
($i==0 || $i==$end_pos || $prev_c=="." || $prev_c=="@"))
return false;
$prev_c=$c;
}
return ($at==1 && $dot>0);
}
?>
emperorshishire at gmail dot com
25-Feb-2009 04:31
25-Feb-2009 04:31
I found myself needing to find the first position of multiple needles in one haystack. So I wrote this little function:
<?php
function multineedle_stripos($haystack, $needles, $offset=0) {
foreach($needles as $needle) {
$found[$needle] = stripos($haystack, $needle, $offset);
}
return $found;
}
// It works as such:
$haystack = "The quick brown fox jumps over the lazy dog.";
$needle = array("fox", "dog", ".", "duck")
var_dump(multineedle_stripos($haystack, $needle));
/* Output:
array(3) {
["fox"]=>
int(16)
["dog"]=>
int(40)
["."]=>
int(43)
["duck"]=>
bool(false)
}
*/
?>
Ysangkok
06-Mar-2008 04:44
06-Mar-2008 04:44
@henke:
No. It does NOT make a warning if the needle isn't found. This is false.
henke at henke37 dot cjb dot net
09-Dec-2007 07:48
09-Dec-2007 07:48
This function will raise a warning if the needle was not found. Be sure to use @ to suppress it if you want the strpos like behavior of only returning false.
hpavon at gmail dot com
19-Jul-2007 09:54
19-Jul-2007 09:54
To shane_at_51smith-dot-nl
Fine but not useful if you want to use stripos 3rd param òffset´ for instance to find all occurences of `needle´.
Again rchillet and heavyraptor solution is best though you'd better keep to-lowercase strings outside the function if you're planning to loop through `haystack´ like this:
$lower_haystack = strtolower($haystack);
$lower_needle = strtolower($needle);
$offset = 0;
//... looping over haystack
while ($offset !== false) {
$offset = strpos($lower_haystack, $lower_needle, $offset);
//... some funny stuff here
}
Using rchillet-heavyraptor function here would slow down performance. Solution: don't invent any function
shane_at_51smith-dot-nl
03-Jul-2007 09:46
03-Jul-2007 09:46
Yet another stripos for php4 alternative:
<?php
function stripos($haystack, $needle){
return strpos($haystack, stristr( $haystack, $needle ));
}
$strTest = "The brown fox jumped over the Fence";
echo stripos($strTest, 'fence');//30
?>
grf at post dot cz
20-Mar-2007 01:57
20-Mar-2007 01:57
(i'm very sorry for some mistakes in my yesterday's post :'[ )
this would to work with any language, i hope.
tested on czech (eastern europe) lang.
<?php
/****************************************
* SAFE HIGHLIGHT
****************************************/
/**
* function finds and encase every string in a $needleArr array with
* strings $shearLft (from the left side) and $shearRgt (guess from which
* side).
* already encased needles are IGNORED for any other step, so order
* of needles in $needleArr is pretty important.
*
* function is searching needles in case-insensitive mode,
* but case in the subject is saved.
*
* can you do it better? so, do it.
*
* @param array $needleArr array of needles
* @param string $shearLft left shear
* @param string $shearRgt right shear
* @param string $subject subject
* @param string $encoding encoding ('utf-8' is default)
*
* @author griffin
*/
function safeHighlight( $needleArr, $shearLft, $shearRgt, $subject, $encoding = 'utf-8')
{
// encoding
$e = $encoding;
// oh, no needles
if( !is_array( $needleArr))
return $subject;
// empty keys throw-off, only unique, reindex
$nA = array_values(
array_unique(
array_diff( $needleArr, array(''))
)
);
// needle count
if( !($nC = count( $nA)))
return $subject; // nothing to hl
// shear length
if( !(($rLL = mb_strlen( $rL = $shearLft, $e))
+ ($rRL = mb_strlen( $rR = $shearRgt, $e))))
return $subject; // no shears
// subject length
if( !($sL = mb_strlen( $s = $subject, $e)))
return null; // empty subject
// subject in lowercase (we need to aviod
// using mb_stripos due to PHP version)
$sW = mb_strtolower( $s, $e);
// masking ~ 0=not changed, 1=changed
$m = str_repeat( '0', $sL);
// loop for each needle
for( $n=0; $n<$nC; $n++)
{
// needle string loWercase
$nW = mb_strtolower( $nA[ $n], $e);
$o = 0; // offset
$nL = mb_strlen( $nW, $e); // needle length
// search needle
while( false !== ($p = mb_strpos( $sW, $nW, $o, $e)))
{
// oh hurrey, needle found on $p position
// is founded needle already modified? (in full-length)
for( $q=$p; $q<($p+$nL); $q++)
if( $m[ $q])
{
// ai, caramba. already modified, jump over
$o+= $nL;
// continue for while() loop - not for for() loop!
continue 2;
}
// explode subject and mask into three parts
// partA|needle|partB
$sE[0] = mb_substr( $s, 0, $p, $e);
$sE[1] = mb_substr( $s, $p, $nL, $e);
$sE[2] = mb_substr( $s, $p+$nL, $sL-$p-$nL, $e);
// mask
// partA|partB (needle not needed)
$mE[0] = mb_substr( $m, 0, $p, $e);
$mE[1] = mb_substr( $m, $p+$nL, $sL-$p-$nL, $e);
// apply shears
$sE[1] = $rL.$sE[1].$rR;
// update sunject length
$sL+= $rLL + $rRL;
// update mask
$m = $mE[0] . str_repeat( '1', $rLL + $nL + $rRL) . $mE[1];
// implode into a subject
$s = implode( $sE);
// update lowercase subject
$sW = mb_strtolower( $s, $e);
// increase offset
$o+= $rLL + $nL + $rRL;
// end of string reached
if( $o>=$sL)
break;
} // while()
} // for( $n=0; $n<$nC; $n++)
// oouu yeaaa, kick the subject out of the function
return $s;
} // function safeHighlight()
/****************************************
* END: SAFE HIGHLIGHT
****************************************/
?>
dazzle
16-Aug-2006 04:20
16-Aug-2006 04:20
I recommend using the solution by rchillet for <PHP5
michiels solution is quite slow if you use it for long strings or call it many times.
michiel at mb-it dot nl
10-Jul-2006 01:03
10-Jul-2006 01:03
Since the stripos-function is PHP5-only, the function below could give PHP4-users the same functionallity:
function stripos($string,$word)
{
$retval = false;
for($i=0;$i<=strlen($string);$i++)
{
if (strtolower(substr($string,$i,strlen($word))) == strtolower($word))
{
$retval = true;
}
}
return $retval;
}
rchillet at hotmail dot com
28-Apr-2006 10:45
28-Apr-2006 10:45
improvement the function of heavyraptor with int offset parametre.
if (!function_exists("stripos")) {
function stripos($str,$needle,$offset=0)
{
return strpos(strtolower($str),strtolower($needle),$offset);
}
}
heavyraptor
21-Mar-2006 03:59
21-Mar-2006 03:59
If you're using PHP < 5, you can use this alternate function, same thing like stripos:
<?php
if (!function_exists("stripos")) {
function stripos($str,$needle) {
return strpos(strtolower($str),strtolower($needle));
}
}
?>
Such a logical function but I hope it helps ...
sim
02-Oct-2004 07:17
02-Oct-2004 07:17
Just to be explicit, the position index returned by strpos starts at 0, not 1. e.g. strpos('abc','a') returns 0.
aidan at php dot net
30-May-2004 07:36
30-May-2004 07:36
This functionality is now implemented in the PEAR package PHP_Compat.
More information about using this function without upgrading your version of PHP can be found on the below link:
http://pear.php.net/package/PHP_Compat