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I have clean function for remove special caracter from string but that function also removing Turkish caracter (ı,ğ,ş,ç,ö) from string
function clean($string) {
$string = str_replace(' ', ' ', $string);
$string = preg_replace('/[^A-Za-z0-9\-]/', ' ', $string);
return preg_replace('/-+/', '-', $string);
}
How can I fix it ?
Add those characters you want to keep to preg, also add Upper cases if neededç I edited your code:
function clean($string) {
$string = str_replace(' ', ' ', $string);
$string = preg_replace('/[^A-Za-z0-9\-ığşçöüÖÇŞİıĞ]/', ' ', $string);
return preg_replace('/-+/', '-', $string);
}
Test:
$str='Merhaba=Türkiye 12345 çok çalış another one ! *, !#_';
var_dump(clean($str));
//Output: string(57) "Merhaba Türkiye 12345 çok çalış another one "
You can use iconv to replacing special characters like à->a, è->e
<?php
$string = "ʿABBĀSĀBĀD";
echo iconv('UTF-8', 'ISO-8859-1//TRANSLIT', $string);
// output: [nothing, and you get a notice]
echo iconv('UTF-8', 'ISO-8859-1//IGNORE', $string);
// output: ABBSBD
echo iconv('UTF-8', 'ISO-8859-1//TRANSLIT//IGNORE', $string);
// output: ABBASABAD
// Yay! That's what I wanted!
?>
Credits:
https://gist.github.com/swas/10643194
#dmp y
#Nisse Engström
Maybe you can try:
function clean($string) {
$string = str_replace(' ', ' ', $string);
$string = preg_replace('/[^A-Za-z0-9ĞİŞığşçö\-]/', ' ', $string);
return preg_replace('/-+/', '-', $string);
}
Which special characters you want to replace?
Maybe be it'll be easier to change a paradigm of cleaning from everything except ... to something concrete.
<?php
function garbagereplace($string) {
$garbagearray = array('#','#','$','%','^','&','*');
$garbagecount = count($garbagearray);
for ($i=0; $i<$garbagecount; $i++) {
$string = str_replace($garbagearray[$i], '-', $string);
}
return $string;
}
echo garbagereplace('text##$text%^&*text');
?>
I am using regular expression for getting multiple patterns from a given string.
Here, I will explain you clearly.
$string = "about us";
$newtag = preg_replace("/ /", "_", $string);
print_r($newtag);
The above is my code.
Here, i am finding the space in a word and replacing the space with the special character what ever i need, right??
Now, I need a regular expression that gives me patterns like
about_us, about-us, aboutus as output if i give about us as input.
Is this possible to do.
Please help me in that.
Thanks in advance!
And finally, my answer is
$string = "contact_us";
$a = array('-','_',' ');
foreach($a as $b){
if(strpos($string,$b)){
$separators = array('-','_','',' ');
$outputs = array();
foreach ($separators as $sep) {
$outputs[] = preg_replace("/".$b."/", $sep, $string);
}
print_r($outputs);
}
}
exit;
You need to do a loop to handle multiple possible outputs :
$separators = array('-','_','');
$string = "about us";
$outputs = array();
foreach ($separators as $sep) {
$outputs[] = preg_replace("/ /", $sep, $string);
}
print_r($outputs);
You can try without regex:
$string = 'about us';
$specialChar = '-'; // or any other
$newtag = implode($specialChar, explode(' ', $string));
If you put special characters into an array:
$specialChars = array('_', '-', '');
$newtags = array();
foreach ($specialChars as $specialChar) {
$newtags[] = implode($specialChar, explode(' ', $string));
}
Also you can use just str_replace()
foreach ($specialChars as $specialChar) {
$newtags[] = str_replace(' ', $specialChar, $string);
}
Not knowing exactly what you want to do I expect that you might want to replace any occurrence of a non-word (1 or more times) with a single dash.
e.g.
preg_replace('/\W+/', '-', $string);
If you just want to replace the space, use \s
<?php
$string = "about us";
$replacewith = "_";
$newtag = preg_replace("/\s/", $replacewith, $string);
print_r($newtag);
?>
I am not sure that regexes are the good tool for that. However you can simply define this kind of function:
function rep($str) {
return array( strtr($str, ' ', '_'),
strtr($str, ' ', '-'),
str_replace(' ', '', $str) );
}
$result = rep('about us');
print_r($result);
Matches any character that is not a word character
$string = "about us";
$newtag = preg_replace("/(\W)/g", "_", $string);
print_r($newtag);
in case its just that... you would get problems if it's a longer string :)
How can i remove duplicate commas used in string.
String = ",a,b,c,,,d,,"
I tried rtrim and itrim functions and removed the unwanted commas from beginning and ending .How can i remove duplicate commas ?
Try this:
$str = preg_replace('/,{2,}/', ',', trim($str, ','));
The trim will remove starting and trailing commas, while the preg_replace will remove duplicate ones.
See it in action!
Also, as #Spudley suggested, the regex /,{2,}/ could be replaced with /,,+/ and it would work too.
EDIT:
If there are spaces between commas, you may try adding the following line after the one above:
$str = implode(',', array_map('trim', explode(',', $str)))
i think you can just explode your string and then create a new one getting only relevant data
$string = ",a,b,c,,,d,,";
$str = explode(",", $string);
$string_new = '';
foreach($str as $data)
{
if(!empty($data))
{
$string_new .= $data. ',';
}
}
echo substr_replace($string_new, '', -1);
This will output
a,b,c,d
Live Demo
EDITED
If you are having problems with blank spaces you can try use this code
$string = ",a,b,c, ,,d,,";
$str = explode(",", str_replace(' ', '', $string));
$string_new = '';
foreach($str as $data)
{
if(!empty($data))
{
$string_new .= $data. ',';
}
}
echo substr_replace($string_new, '', -1);
This should solve spaces issue
Probably not very fast, but a simple method may be:
$str = "a,b,c,,,d";
$str2 = "";
while($str <> $str2) {
$str2 = $str;
$str = str_replace(',,', ',', $str);
}
<?php
$str = ",a,b,c,,,d,,"
echo $str=str_replace(',,','',$str);
?>
Output:
,a,b,c,d
<?php
$str = ",a,b,c,,,d,,"
echo $str=trim(str_replace(',,','',$str),',');
?>
Output:
a,b,c,d
Is it possible to use php's preg_replace to remove anything in a string except specific words?
For example:
$text = 'Hello, this is a test string from php.';
I want to remove everything except "test" and "php" so it will be:
$text will be 'test php'
You could always use a callback. Under PHP 5.3:
$keep = array('test'=>1, 'php'=>1);
$text = trim(
preg_replace(
'/[^A-Za-z]+/', ' ',
preg_replace_callback(
'/[A-Za-z]+/',
function ($matched) use (&keep) {
if (isset($keep[$matched[0]])) {
return $matched[0];
}
return '';
}, $text
) ) );
Alternatively:
$text =
array_intersect(
preg_split('/[^A-Za-z]+/', $text),
array('test', 'php')
);
$text = 'Hello, this is a test string from php.';
$words = preg_split('~\W~', $text, -1, PREG_SPLIT_NO_EMPTY);
$allowed_words = array('test'=>1, 'php'=>1);
$output = array();
foreach($words as $word)
{
if(isset($allowed_words[$word]))
{
$output[] = $word;
}
}
print implode(' ', $output);
I have a doubt again on RegEx in Php.
Assume that I have a line like this
716/52 ; 250/491.1; 356/398; 382/144
I want the output to be
Replace all semi-colon with comma. I think I can do this using
$myline= str_replace(";", ",", $myline);
Interchange the numbers and replace '/' with a comma. That is, 716/52 will become 52,716. This is where I get stuck.
So, the output should be
52,716 , 491.1,250, 398,356, 144,382
I know that using sed, I can achieve it as
1,$s/^classcode:[\t ]\+\([0-9]\+\)\/\([0-9]\+\)/classcode: \2\,\1/
But, how do I do it using preg_match in php?
$str = '716/52 ; 250/491.1; 356/398; 382/144';
$str = str_replace(';', ',', $str);
$res = preg_replace_callback('~[\d.]+/[\d.]+~', 'reverse', $str);
function reverse($matches)
{
$parts = explode('/', $matches[0]);
return $parts[1] . ',' . $parts[0];
}
var_dump($res);
And working sample: http://ideone.com/BeS9j
UPD: PHP 5.3 version with anonymous functions
$str = '716/52 ; 250/491.1; 356/398; 382/144';
$str = str_replace(';', ',', $str);
$res = preg_replace_callback('~[\d.]+/[\d.]+~', function ($matches) {
$parts = explode('/', $matches[0]);
return $parts[1] . ',' . $parts[0];
}, $str);
var_dump($res);
As an alternative to Regexen you could try this:
echo join(', ', array_map(
function ($s) { return join(',', array_reverse(explode('/', trim($s)))); },
explode(';', $string)));
$str = '716/52 ; 250/491.1; 356/398; 382/144';
$str = preg_replace('(\d+(?:\.\d+)?)\/(\d+(?:\.\d+)?)', '$2,$1', $str);
$str = str_replace(';', ',', $str);
Uses two capture groups, replacing them in reverse order. See it here.