I have this string
$s = 'Yo be [diggin = array("fruit"=> "apple")] scriptzors!';
which then gets checked by
$matches = null;
preg_match_all('/\[(.*?)\]/', $s, $matches);
var_dump($matches[1]);
but what I want it to do is the following, it should return the following
print "yo be";
$this->diggin(SEND ARRAY HERE);
print "scriptzors!";
EDIT to show issue with below answer
$s = 'Yo be [diggin = array("fruit"=>"apple")] scriptzors!';
$matches = null;
preg_match_all('/\[(.*?)\]/', $s, $matches);
$var = explode(' = ', $matches[1]);
print $var[0]; //THIS DOES NOT PRINT
You're sort of close. You can explode the string with = but with spaces included around the =. Then the first element would be the function name, in this case diggin and the second element would be the array but as a string. You'll need to eval that one so that it'll be a proper array data type.
$var = explode(' = ', $matches[1][0]);
call_user_func_array(array($this, $var[0]), eval($var[1] . ';'));
// or do
$this->{var[0]}(eval($val[1] . ';'));
As an alternative, you can also modify the regex so that you don't have to call explode.
preg_match_all('/\[([a-z0-9_]*)\s*?=\s*(.*)\]/i', $s, $matches);
Either way, you'll want to make sure that you sanitize the user input because eval can be evil.
This will call the function without using eval and exposing yourself to code injection.
preg_match_all('/\[([a-z0-9_]*)\s*?=\s*array\((.*)*\)\]/i', $s, $matches);
$var = explode(',', $matches[2][0]);
$result = array();
foreach ($var as $value) {
$keyvaluepair = explode('=>', $value);
$result[$keyvaluepair[0]] = $keyvaluepair[1];
}
$this->{var[0]}($result);
Related
Is there any way I can replace one value and retrieve another in the same string in a more efficient way than in the code below, for example a method that combines preg_replace() and preg_match()?
$string = 'abc123';
$variable = '123';
$newString = preg_replace("/(abc)($variable)/",'$1$2xyz', $string);
preg_match("/(abc)($variable)/", $string, $matches);
$number = $matches[2];
You can use a single call to preg_replace_callback() and update the value of $number in the code of the callback function:
$string = 'abc123';
$variable = '123';
$number = NULL;
$newString = preg_replace_callback(
"/(abc)($variable)/",
function ($matches) use (& $number) {
$number = $matches[2];
return $matches[1].$matches[2].'xyz';
},
$string
);
I don't think there is a big speed improvement. The only advantage could be on the readability.
i need to change this line: count(id)
to line like this count(tableName.id)
i try to do this with preg match and replace like this:
$a = "count(id)";
$regex = "/\w{3,}+\W/";
$dd = preg_match("/\(.*?\)/", $a, $matches);
$group = $matches[0];
if (preg_match($regex, $a)) {
$c = preg_replace("$group", "(table.`$group`)", $a);
var_dump($c);
}
output that i got is : count((table.(id))) its outputting me extra brackets . i know the problem but i can't find solution because my regex knowledge not so good.
$a = "count(id)";
$regex = "/\w{3,}+\W/";
$dd = preg_match("/\((.*?)\)/", $a, $matches);
$group = $matches[1]; // <-- you'll get error if the above regex doesn't match!
if (preg_match($regex, $a)) {
$c = preg_replace("/$group/", "table.$group", $a);
}
I need some help with twitter hashtag, I need to extract a certain hashtag as string variable in PHP.
Until now I have this
$hash = preg_replace ("/#(\\w+)/", "#$1", $tweet_text);
but this just transforms hashtag_string into link
Use preg_match() to identify the hash and capture it to a variable, like so:
$string = 'Tweet #hashtag';
preg_match("/#(\\w+)/", $string, $matches);
$hash = $matches[1];
var_dump( $hash); // Outputs 'hashtag'
Demo
I think this function will help you:
echo get_hashtags($string);
function get_hashtags($string, $str = 1) {
preg_match_all('/#(\w+)/',$string,$matches);
$i = 0;
if ($str) {
foreach ($matches[1] as $match) {
$count = count($matches[1]);
$keywords .= "$match";
$i++;
if ($count > $i) $keywords .= ", ";
}
} else {
foreach ($matches[1] as $match) {
$keyword[] = $match;
}
$keywords = $keyword;
}
return $keywords;
}
As i understand you are saying that
in text/pargraph/post you want to show tag with hash sign(#) like this:- #tag
and in url you want to remove # sign because the string after # is not sended to server in request so i have edited your code and try out this:-
$string="www.funnenjoy.com is best #SocialNetworking #website";
$text=preg_replace('/#(\\w+)/','<a href=/hash/$1>$0</a>',$string);
echo $text; // output will be www.funnenjoy.com is best <a href=search/SocialNetworking>#SocialNetworking</a> <a href=/search/website>#website</a>
Extract multiple hashtag to array
$body = 'My #name is #Eminem, I am rap #god, #Yoyoya check it #out';
$hashtag_set = [];
$array = explode('#', $body);
foreach ($array as $key => $row) {
$hashtag = [];
if (!empty($row)) {
$hashtag = explode(' ', $row);
$hashtag_set[] = '#' . $hashtag[0];
}
}
print_r($hashtag_set);
You can use preg_match_all() PHP function
preg_match_all('/(?<!\w)#\w+/', $description, $allMatches);
will give you only hastag array
preg_match_all('/#(\w+)/', $description, $allMatches);
will give you hastag and without hastag array
print_r($allMatches)
You can extract a value in a string with preg_match function
preg_match("/#(\w+)/", $tweet_text, $matches);
$hash = $matches[1];
preg_match will store matching results in an array. You should take a look at the doc to see how to play with it.
Here's a non Regex way to do it:
<?php
$tweet = "Foo bar #hashTag hello world";
$hashPos = strpos($tweet,'#');
$hashTag = '';
while ($tweet[$hashPos] !== ' ') {
$hashTag .= $tweet[$hashPos++];
}
echo $hashTag;
Demo
Note: This will only pickup the first hashtag in the tweet.
I want to normalize (so canonicalize) a string into the normal form for names:
First letter of the name is uppercase
The difficulty by this is now to follow this rule with second and third name.
My method:
public function namilize($string)
{
$strings = explode(' ', $string);
foreach ($strings as $string) {
$string = ucfirst(strtolower($string));
}
$string = implode(' ', $strings);
return $string;
}
Somehow the
$string = ucfirst(strtolower($string));
fails.
What do I have to correct?
Is there a better way?
Regards
EDIT:
Hi,
thank you all for all the comments and answers.
I found another "modern" method:
public function namilize($string)
{
$string = mb_convert_case($string, MB_CASE_TITLE, mb_detect_encoding($string));
}
When I now would additionally add some regex for Mc and O's than it would be complete :)
public function namilize($name) {
$name = strtolower($name);
$normalized = array();
foreach (preg_split('/([^a-z])/', $name, NULL, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY) as $word) {
if (preg_match('/^(mc)(.*)$/', $word, $matches)) {
$word = $matches[1] . ucfirst($matches[2]);
}
$normalized[] = ucfirst($word);
}
return implode('', $normalized);
}
Note that this will work for names like John O'Brian, James McManus, etc. For other names with prefixes like McManus, simply add the prefix to the preg_match(). Obviously, this runs the possibility of false positives, but no method is going to be 100% foolproof.
You have to pass the $string by reference, note the &:
public function namilize($string)
{
$strings = explode(' ', $string);
foreach ($strings as &$string) {
$string = ucfirst(strtolower($string));
}
$string = implode(' ', $strings);
return $string;
}
Or use the function suggested by #thetaiko ucwords($string)
The $string inside the foreach will only store the last iteration (or the last name). This doesn't really matter though because the variable in the foreach is never used for output. The implode just undoes what you did with the explode so you will end up with the exact same output as the input. I changed the variable names to be more descriptive in this example:
function namilize($name_in)
{
$a_names = explode(' ', $name_in); //explode string into array
foreach ($a_names as $name) {
$a_fullname[] = ucfirst(strtolower($name)); //build array of proper case names
}
$string = implode(' ', $a_fullname); //convert array into string
return $string;
}
I have a string in PHP that is a URI with all arguments:
$string = http://domain.com/php/doc.php?arg1=0&arg2=1&arg3=0
I want to completely remove an argument and return the remain string. For example I want to remove arg3 and end up with:
$string = http://domain.com/php/doc.php?arg1=0&arg2=1
I will always want to remove the same argument (arg3), and it may or not be the last argument.
Thoughts?
EDIT: there might be a bunch of wierd characters in arg3 so my prefered way to do this (in essence) would be:
$newstring = remove $_GET["arg3"] from $string;
There's no real reason to use regexes here, you can use string and array functions instead.
You can explode the part after the ? (which you can get using substr to get a substring and strrpos to get the position of the last ?) into an array, and use unset to remove arg3, and then join to put the string back together.:
$string = "http://domain.com/php/doc.php?arg1=0&arg2=1&arg3=0";
$pos = strrpos($string, "?"); // get the position of the last ? in the string
$query_string_parts = array();
foreach (explode("&", substr($string, $pos + 1)) as $q)
{
list($key, $val) = explode("=", $q);
if ($key != "arg3")
{
// keep track of the parts that don't have arg3 as the key
$query_string_parts[] = "$key=$val";
}
}
// rebuild the string
$result = substr($string, 0, $pos + 1) . join($query_string_parts);
See it in action at http://www.ideone.com/PrO0a
preg_replace("arg3=[^&]*(&|$)", "", $string)
I'm assuming the url itself won't contain arg3= here, which in a sane world should be a safe assumption.
$new = preg_replace('/&arg3=[^&]*/', '', $string);
This should also work, taking into account, for example, page anchors (#) and at least some of those "weird characters" you mention but don't seem worried about:
function remove_query_part($url, $term)
{
$query_str = parse_url($url, PHP_URL_QUERY);
if ($frag = parse_url($url, PHP_URL_FRAGMENT)) {
$frag = '#' . $frag;
}
parse_str($query_str, $query_arr);
unset($query_arr[$term]);
$new = '?' . http_build_query($query_arr) . $frag;
return str_replace(strstr($url, '?'), $new, $url);
}
Demo:
$string[] = 'http://domain.com/php/doc.php?arg1=0&arg2=1&arg3=0';
$string[] = 'http://domain.com/php/doc.php?arg1=0&arg2=1';
$string[] = 'http://domain.com/php/doc.php?arg1=0&arg2=1&arg3=0#frag';
$string[] = 'http://domain.com/php/doc.php?arg1=0&arg2=1&arg3=0&arg4=4';
$string[] = 'http://domain.com/php/doc.php';
$string[] = 'http://domain.com/php/doc.php#frag';
$string[] = 'http://example.com?arg1=question?mark&arg2=equal=sign&arg3=hello';
foreach ($string as $str) {
echo remove_query_part($str, 'arg3') . "\n";
}
Output:
http://domain.com/php/doc.php?arg1=0&arg2=1
http://domain.com/php/doc.php?arg1=0&arg2=1
http://domain.com/php/doc.php?arg1=0&arg2=1#frag
http://domain.com/php/doc.php?arg1=0&arg2=1&arg4=4
http://domain.com/php/doc.php
http://domain.com/php/doc.php#frag
http://example.com?arg1=question%3Fmark&arg2=equal%3Dsign
Tested only as shown.