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(';', ',', $str);
Uses two capture groups, replacing them in reverse order. See it here.
Related
I have a php function which generates tags from string:
function generate_tags($text)
{
$string = preg_replace('/[^\p{L}\p{N}\s]/u', ' ', $text);
$string = preg_replace('/\s+/', ' ', $string);
$string = mb_strtolower($string, 'UTF-8');
$keywords = explode(' ', trim($string));
foreach($keywords as $key => $value)
{
if((strlen($value)) < 1)
{
unset($keywords[$key]);
continue;
}
}
$result = array_unique($keywords);
$result = array_values($result);
return $result;
}
The string is:
Ke$ha - We Are Who We Are (Cherry Cole Private Booty) Full Oficial Version
But it replaces $ symbol. How can I prevent $ symbol on my function?
Modify the first preg_replace to skip over $ as well:
$string = preg_replace('/[^\p{L}\p{N}\s$]/u', ' ', $text);
Modify the first preg_replace to skip over $ as well:$string = preg_replace('/[^\p{L}\p{N}\s$]/u', ' ', $text);
you just have to press the tick underneath the voting buttons.
Here is my character
/public/proj/index.php/home
/public/proj/index.php/test
/public/proj/home
/public/proj/test
I just need to replace the character after the right most '/' to login. So that it will be
/public/proj/index.php/login
/public/proj/index.php/login
/public/proj/login
/public/proj/login
Try this -
$str = "/public/proj/index.php/home";
$vals = explode('/', $str);
$vals[count($vals)-1] = 'login';
$str = implode('/', $vals);
var_dump($str);
This should work for you:
$str = "/public/proj/home";
echo $str = substr_replace($str, "login", -1*(strlen(basename($str))), strlen(basename($str)));
Output:
/public/proj/login
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
I wan't to replace
[a href='url']link[/a]
to
<a href='url'>link</a>
I am using $line = str_replace("[a href='+(.*)+']", "<a href='+(.*)+' >", $line); is not working.
Why not just use:
$search = array('[', ']');
$replace = array('<', '>');
$line = str_replace($search, $replace, $line);
You have to use a regular expression to do this
$line = preg_replace('~\\[a +href=\'([^\']+)\'\\]([^\\[]+)\\[/a\\]~', '$2', $line);
simply use
$string = str_replace(array('[', ']'), array('<', '>'), $string);
This is a great tutorial http://www.youtube.com/watch?v=x9VLWlQhNtM it shows you how to make a small templating engine and it covers what your asking
Try this :
$str = "[a href='url']link[/a]";
$new_str = preg_replace('/\[a href=\'(.*)\'\](.*)\[\/a\]/','<a href=\'$1\'>$2</a>',$str);
echo $new_str;