I have some words with | between each one and I have tried to use preg_match to detect if it's containing target word or not.
I have used this:
<?php
$c_words = 'od|lom|pod|dyk';
$my_word = 'od'; // only od not pod or other word
if (preg_match('/$my_word/', $c_words))
{
echo 'ok';
}
?>
But it doesn't work correctly.
Please help.
No need for regular expressions. The functions explode($delimiter, $str); and in_array($needle, $haystack); will do everything for you.
// splits words into an array
$array = explode('|', $c_words);
// check if "$my_word" exists in the array.
if(in_array($my_word, $array)) {
// YEP
} else {
// NOPE
}
Apart from that, your regular expression would match other words containing the same sequence too.
preg_match('/my/', 'myword|anotherword'); // true
preg_match('/another/', 'myword|anotherword'); // true
That's exactly why you shouldn't use regular expressions in this case.
You can't pass a variable into a string with single quotes, you need to use either
preg_match("/$my_word/", $c_words);
Or – and I find that cleaner :
preg_match('/' .$my_word. '/', $c_words);
But for something as simple as that I don't even know if I'd use a Regex, a simple if (strpos($c_words, $my_word) !== 0) should be enough.
You are using preg_match() the wrong way. Since you're using | as a delimiter you can try this:
if (preg_match('/'.$all_words.'/', $my_word, $c_words))
{
echo 'ok';
}
Read the documentation for preg_match().
Related
i have a variable and i want to use php to check if it contains a group of characters
i would like the code to be like this
$groupofcharacters = ["$","#","*","("];
if($variable contains any of the letters in $groupofcharacters){
//do something}
i know that this will need the use of strpos() function but how can i use the strpos function to check if a variable contains a group of characters without me having to create a strpos() function for all the characters that i want to check for.
please if you don't understand you can tell me in the comments
Best way to solve your issue is by using RegEx. Try this:
<?php
$variable = 'Any string containing $*(#';
$sPattern = '/[$#*(]/';
if (preg_match($sPattern, $variable)) {
// Do something
}
You can use strpbrk to achieve this. The doc says:
strpbrk — Search a string for any of a set of characters
Returns a string starting from the character found, or FALSE if it is not found.
Snippet:
<?php
if(strpbrk($variable,"$#*(") !== false){
// your logic goes here
}
check if it has any char. Using strpos
First you need to combine the array as string after check ot if there's one of them in the
$groupofcharacters = ["$","#","*","("];
$strs = implode("", $groupofcharacters);
foreach(str_split($variable) as $s) {
if (strpos($s, $strs)) {
echo "it contains "; continue;
}
}
How to match any thing dosen't contain a specific word using RegExp
Ex:
Match any string doesn't contain 'aabbcc'
bbbaaaassdd // Match this
aabbaabbccaass // Reject this
If you're just after this sequence of characters, don't use a Regular Expression. Use strpos().
if (strpos('aabbaabbccaass', 'aabbcc') !== false) {
echo 'Reject this.'
}
Note: Be sure to read the warning in the manual about strpos() return values.
You can use negative lookahead:
(?!.*?aabbcc)^.*$
Live Demo: http://www.rubular.com/r/4Exbf7UdDv
PHP Code:
$str = 'aabbaabbccaass'; //or whatever
if (preg_match('/(?!.*?aabbcc)^.*$/', $str))
echo "accepted\n";
else
echo "rejected\n";
try this to avoid some sequences of letters :
^((?!aabbcc).)*$
try this:
if(preg_match('/aabbcc/', $string) == 0) {
[ OK ]
}
else {
[ NOT OK ]
}
You can use this to describe a substring that doesn't contain aabbcc:
(?>[^a]++|a(?!abbcc))*
for the whole string, just add anchors (^ $)
$var="UseCountry=1
UseCountryDefault=1
UseState=1
UseStateDefault=1
UseLocality=1
UseLocalityDefault=1
cantidad_productos=5
expireDays=5
apikey=ABQIAAAAFHktBEXrHnX108wOdzd3aBTupK1kJuoJNBHuh0laPBvYXhjzZxR0qkeXcGC_0Dxf4UMhkR7ZNb04dQ
distancia=15
AutoCoord=1
user_add_locality=0
SaveContactForm=0
ShowVoteRating=0
Listlayout=0
WidthThumbs=100
HeightThumbs=75
WidthImage=640
HeightImage=480
ShowImagesSystem=1
ShowOrderBy=0
ShowOrderByDefault=0
ShowOrderDefault=DESC
SimbolPrice=$
PositionPrice=0
FormatPrice=0
ShowLogoAgent=1
ShowReferenceInList=1
ShowCategoryInList=1
ShowTypeInList=1
ShowAddressInList=1
ShowContactLink=1
ShowMapLink=1
ShowAddShortListLink=1
ShowViewPropertiesAgentLink=1
ThumbsInAccordion=5
WidthThumbsAccordion=100
HeightThumbsAccordion=75
ShowFeaturesInList=1
ShowAllParentCategory=0
AmountPanel=
AmountForRegistered=5
RegisteredAutoPublish=1
AmountForAuthor=5
AmountForEditor=5
AmountForPublisher=5
AmountForManager=5
AmountForAdministrator=5
AutoPublish=1
MailAdminPublish=1
DetailLayout=0
ActivarTabs=0
ActivarDescripcion=1
ActivarDetails=1
ActivarVideo=1
ActivarPanoramica=1
ActivarContactar=1
ContactMailFormat=1
ActivarReservas=1
ActivarMapa=1
ShowImagesSystemDetail=1
WidthThumbsDetail=120
HeightThumbsDetail=90
idCountryDefault=1
idStateDefault=1
ms_country=1
ms_state=1
ms_locality=1
ms_category=1
ms_Subcategory=1
ms_type=1
ms_price=1
ms_bedrooms=1
ms_bathrooms=1
ms_parking=1
ShowTextSearch=1
minprice=
maxprice=
ms_catradius=1
idcatradius1=
idcatradius2=
ShowTotalResult=1
md_country=1
md_state=1
md_locality=1
md_category=1
md_type=1
showComments=0
useComment2=0
useComment3=0
useComment4=0
useComment5=0
AmountMonthsCalendar=3
StartYearCalendar=2009
StartMonthCalendar=1
PeriodOnlyWeeks=0
PeriodAmount=3
PeriodStartDay=1
apikey=ABQIAAAAJ879Hg7OSEKVrRKc2YHjixSmyv5A3ewe40XW2YiIN-ybtu7KLRQiVUIEW3WsL8vOtIeTFIVUXDOAcQ
";
in that string only i want "api==ABQIAAAAJ879Hg7OSEKVrRKc2YHjixSmyv5A3ewe40XW2YiIN-ybtu7KLRQiVUIEW3WsL8vOtIeTFIVUXDOAcQ";
plz guide me correctly;
EDIT
As shamittomar pointed out, the parse_str will not work for this situation, posted the proper regex below.
Given this seems to be a QUERY STRING, use the parse_str() function PHP provides.
UPDATE
If you want to do it with regex using preg_match() as powertieke pointed out:
preg_match('/apikey=(.*)/', $var, $matches);
echo $matches[1];
Should do the trick.
preg_match(); should be right up your alley
people are so fast to jump to preg match when this can be done with regular string functions thats faster.
$string = '
expireDays=5
apikey=ABQIAAAAFHktBEXrHnX108wOdzd3aBTupK1kJuoJNBHuh0laPBvYXhjzZxR0qkeXcGC_0Dxf4UMhkR7ZNb04dQ
distancia=15
AutoCoord=1';
//test to see what type of line break it is and explode by that.
$parts = (strstr($string,"\r\n") ? explode("\r\n",$string) : explode("\n",$string));
$data = array();
foreach($parts as $part)
{
$sub = explode("=",trim($part));
if(!empty($sub[0]) || !empty($sub[1]))
{
$data[$sub[0]] = $sub[1];
}
}
and use $data['apikey'] for your api key, i would also advise you to wrpa in function.
I can bet this is a better way to parse the string and much faster.
function ParsemyString($string)
{
$parts = (strstr($string,"\r\n") ? explode("\r\n",$string) : explode("\n",$string));
$data = array();
foreach($parts as $part)
{
$sub = explode("=",trim($part));
if(!empty($sub[0]) || !empty($sub[1]))
{
$data[$sub[0]] = $sub[1];
}
}
return $data;
}
$data = ParsemyString($string);
First of all, you are not looking for
api==ABQIAAAAJ879Hg7OSEKVrRKc2YHjixSmyv5A3ewe40XW2YiIN-ybtu7KLRQiVUIEW3WsL8vOtIeTFIVUXDOAcQ
but you are looking for
apikey=ABQIAAAAJ879Hg7OSEKVrRKc2YHjixSmyv5A3ewe40XW2YiIN-ybtu7KLRQiVUIEW3WsL8vOtIeTFIVUXDOAcQ
It is important to know if the api-key property always occurs at the end and if the length of the api-key value is always the same. I this is the case you could use the PHP substr() function which would be easiest.
If not you would most probably need a regular expression which you can feed to PHPs preg_match() function. Something along the lines of apikey==[a-zA-Z0-9\-] Which matches an api-key containing a-z in both lowercase and uppercase and also allows for dashes in the key. If you are using the preg_match() function you can retrieve the matches (and thus your api-key value).
Please excuse my noob-iness!
I have a $string, and would like to see if it contains any one or more of a group of words, words link ct, fu, sl** ETC. So I was thinking I could do:
if(stristr("$input", "dirtyword1"))
{
$input = str_ireplace("$input", "thisWillReplaceDirtyWord");
}
elseif(stristr("$input", "dirtyWord1"))
{
$input = str_ireplace("$input", "thisWillReplaceDirtyWord2");
}
...ETC. BUT, I don't want to have to keep doing if/elseif/elseif/elseif/elseif...
Can't I just do a switch statement OR have an array, and then simply say something like?:
$dirtywords = { "f***", "c***", w****", "bit**" };
if(stristr("$input", "$dirtywords"))
{
$input = str_ireplace("$input", "thisWillReplaceDirtyWord");
}
I'd appreciate any help at all
Thank you
$dirty = array("fuc...", "pis..", "suc..");
$censored = array("f***", "p***", "s***");
$input= str_ireplace($dirty, $censored , $input);
Note, that you don't have to check stristr() to do a str_ireplace()
http://php.net/manual/en/function.str-ireplace.php
If search and replace are arrays, then str_ireplace() takes a value from each array and uses them to do search and replace on subject. If replace has fewer values than search, then an empty string is used for the rest of replacement values. If search is an array and replace is a string, then this replacement string is used for every value of search.
Surely not the best solution since I don't know too much PHP, but what about a loop ?
foreach (array("word1", "word2") as $word)
{
if(stristr("$input", $word))
{
$input = str_ireplace("$input", $word" "thisWillReplaceDirtyWord");
}
}
When you have several objects to test, think "loop" ;-)
Ok this is really difficult to explain in English, so I'll just give an example.
I am going to have strings in the following format:
key-value;key1-value;key2-...
and I need to extract the data to be an array
array('key'=>'value','key1'=>'value1', ... )
I was planning to use regexp to achieve (most of) this functionality, and wrote this regular expression:
/^(\w+)-([^-;]+)(?:;(\w+)-([^-;]+))*;?$/
to work with preg_match and this code:
for ($l = count($matches),$i = 1;$i<$l;$i+=2) {
$parameters[$matches[$i]] = $matches[$i+1];
}
However the regexp obviously returns only 4 backreferences - first and last key-value pairs of the input string. Is there a way around this? I know I can use regex just to test the correctness of the string and use PHP's explode in loops with perfect results, but I'm really curious whether it's possible with regular expressions.
In short, I need to capture an arbitrary number of these key-value; pairs in a string by means of regular expressions.
You can use a lookahead to validate the input while you extract the matches:
/\G(?=(?:\w++-[^;-]++;?)++$)(\w++)-([^;-]++);?/
(?=(?:\w++-[^;-]++;?)++$) is the validation part. If the input is invalid, matching will fail immediately, but the lookahead still gets evaluated every time the regex is applied. In order to keep it (along with the rest of the regex) in sync with the key-value pairs, I used \G to anchor each match to the spot where the previous match ended.
This way, if the lookahead succeeds the first time, it's guaranteed to succeed every subsequent time. Obviously it's not as efficient as it could be, but that probably won't be a problem--only your testing can tell for sure.
If the lookahead fails, preg_match_all() will return zero (false). If it succeeds, the matches will be returned in an array of arrays: one for the full key-value pairs, one for the keys, one for the values.
regex is powerful tool, but sometimes, its not the best approach.
$string = "key-value;key1-value";
$s = explode(";",$string);
foreach($s as $k){
$e = explode("-",$k);
$array[$e[0]]=$e[1];
}
print_r($array);
Use preg_match_all() instead. Maybe something like:
$matches = $parameters = array();
$input = 'key-value;key1-value1;key2-value2;key123-value123;';
preg_match_all("/(\w+)-([^-;]+)/", $input, $matches, PREG_SET_ORDER);
foreach ($matches as $match) {
$parameters[$match[1]] = $match[2];
}
print_r($parameters);
EDIT:
to first validate if the input string conforms to the pattern, then just use:
if (preg_match("/^((\w+)-([^-;]+);)+$/", $input) > 0) {
/* do the preg_match_all stuff */
}
EDIT2: the final semicolon is optional
if (preg_match("/^(\w+-[^-;]+;)*\w+-[^-;]+$/", $input) > 0) {
/* do the preg_match_all stuff */
}
No. Newer matches overwrite older matches. Perhaps the limit argument of explode() would be helpful when exploding.
what about this solution:
$samples = array(
"good" => "key-value;key1-value;key2-value;key5-value;key-value;",
"bad1" => "key-value-value;key1-value;key2-value;key5-value;key-value;",
"bad2" => "key;key1-value;key2-value;key5-value;key-value;",
"bad3" => "k%ey;key1-value;key2-value;key5-value;key-value;"
);
foreach($samples as $name => $value) {
if (preg_match("/^(\w+-\w+;)+$/", $value)) {
printf("'%s' matches\n", $name);
} else {
printf("'%s' not matches\n", $name);
}
}
I don't think you can do both validation and extraction of data with one single regexp, as you need anchors (^ and $) for validation and preg_match_all() for the data, but if you use anchors with preg_match_all() it will only return the last set matched.