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 — Find positionen på den første forekomst af en streng der ikke skelner mellem små og store bogstaver
Beskrivelse
int stripos
( string $haystack
, string $needle
[, int $offset
] )
Returnerer den numeriske position af den første forekomst af needle i haystack -strengen. Ulig strpos() ser stripos() ikke forskel på små og store bogstaver
Noter at needle kan være en streng bestående af et eller flere tegn.
Hvis needle ikke bliver fundet, vil stripos() returnere FALSE
Warning
Denne funktion returnerer muligvis en Boolean FALSE, men kan også returnere en ikke-Booleansk værdi som evalueres til FALSE, så som 0 eller "". Læs venligst sektionen om Booleans for mere information. brug === operatoren for at teste den værdi som returneres af denne funktion.
Example#1 stripos() eksempler
<?php
$findmig = 'a';
$minstreng1 = 'æøå';
$minstreng2 = 'ABC';
$pos1 = stripos($minstreng1, $findmig);
$pos2 = stripos($minstreng2, $findmig);
// Nej, 'a' er absolut ikke i 'xyz'
if ($pos1 === false) {
echo "Strengen '$findmig' blev ikke fundet i strengen '$minstreng1'";
}
// Noter brugen af ===. Bare == ville ikke virke som forventet, da positionen
// af 'a' er den 0te (første) karakter.
if ($pos2 !== false) {
echo "Vi fandt '$findme' i '$mystring2' som nummer $pos2";
}
?>
Hvis needle ikke er en streng, bliver den konverteret til et heltal og tilføjet som ordenstalværdien i et tegn.
Den valgfrie offset -parameter giver dig mulighed for at specificere ved hvilket tegn i haystack søgningen skal starte. Positionen returneret er stadig relativ i forhold til begyndelsen af haystack .
Note: Denne funktion er binary-safe.
Se også strpos(), strrpos(), strrchr(), substr(), stristr(), strstr(), strripos() og str_ireplace().
add a note
User Contributed Notesstripos
vgiralt
19-Aug-2009 09:38
19-Aug-2009 09:38
manualregexp
18-May-2009 10:52
18-May-2009 10:52
Fast email validator using stripos to check for valid characters.
<?php
function validate_email($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 && $dot>0);
}
?>
emperorshishire at gmail dot com
25-Feb-2009 03:31
25-Feb-2009 03:31
I found myself needing to find the first position of multiple needles in one haystack. So I wrote this little function:
<?php
function multineedle_stripos($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 03:44
06-Mar-2008 03:44
@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 06:48
09-Dec-2007 06:48
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 07:54
19-Jul-2007 07:54
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, $offset);
//... some funny stuff here
}
Using rchillet-heavyraptor function here would slow down performance. Solution: don't invent any function
shane_at_51smith-dot-nl
03-Jul-2007 07:46
03-Jul-2007 07:46
Yet another stripos for php4 alternative:
<?php
function stripos($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 12:57
20-Mar-2007 12:57
(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 $s;
} // function safeHighlight()
/****************************************
* END: SAFE HIGHLIGHT
****************************************/
?>
dazzle
16-Aug-2006 02:20
16-Aug-2006 02:20
I recommend using the solution by rchillet for <PHP5
michiels solution is quite slow if you use it for long strings or call it many times.
michiel at mb-it dot nl
10-Jul-2006 11:03
10-Jul-2006 11:03
Since the stripos-function is PHP5-only, the function below could give PHP4-users the same functionallity:
function stripos($string,$word)
{
$retval = false;
for($i=0;$i<=strlen($string);$i++)
{
if (strtolower(substr($string,$i,strlen($word))) == strtolower($word))
{
$retval = true;
}
}
return $retval;
}
rchillet at hotmail dot com
28-Apr-2006 08:45
28-Apr-2006 08:45
improvement the function of heavyraptor with int offset parametre.
if (!function_exists("stripos")) {
function stripos($str,$needle,$offset=0)
{
return strpos(strtolower($str),strtolower($needle),$offset);
}
}
heavyraptor
21-Mar-2006 02:59
21-Mar-2006 02:59
If you're using PHP < 5, you can use this alternate function, same thing like stripos:
<?php
if (!function_exists("stripos")) {
function stripos($str,$needle) {
return strpos(strtolower($str),strtolower($needle));
}
}
?>
Such a logical function but I hope it helps ...
sim
02-Oct-2004 05:17
02-Oct-2004 05:17
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 05:36
30-May-2004 05:36
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