Hi all i need a particulary type of string replace in php.
I need to replace a word with two different others words.
For example: in the string "Hi mom, hi dad" i need to automatically replace the word "hi" with two other different, for example "mary" and "john". So if there is only one occurrence of "Hi" it replace only with "mary" but if there are more than one it uses all the association of words.
So, one word more replaces based on how many times the word occurrence.
Thanks to all who can help me!
preg_replace_callback lets you control each replacement.
You could accomplish this with multiple calls to preg_replace, specifying a limit of 1 for each call:
$string = "Hi mom, hi dad";
preg_replace('/hi/i', 'mary', $str, 1); // "mary mom, hi dad"
preg_replace('/hi/i', 'john', $str, 1); // "mary mom, john dad"
You could generalize this with something like the following. It takes a subject, a pattern, and 1 or more replacement words.
function replace_each($subject, $pattern, $replacement) {
$count = 0;
for ($i = 2; $i < func_num_args(); ++$i) {
$replacement = func_get_arg($i);
$subject = preg_replace($pattern, $replacement, $subject, 1, $count);
if (!$count)
// no more matches
break;
}
return $subject;
}
$string = preg_replace_each("Hi mom, hi dad", "/hi/i", "mary", "john");
echo $string; // "mary mom, john dad"
preg_replace_callback is one way, another is to utilize $limit and $count parameters of preg_replace (see manpage )
$str = "hi foo hi bar hi baz hi quux";
$repl = array('uno', 'dos', 'tres');
do{
$str = preg_replace('~hi~', $repl[0], $str, 1, $count);
$repl[] = array_shift($repl); // rotate the array
} while($count > 0);
I'm not sure if there is a really easy way to do it but take a look at this piece of code i just wrote. This should do the trick for you :)
<?php
class myReplace{
public $replacements = array();
protected $counter = 0;
public function __construct($replacements) {
// fill the array with replacements
$this->replacements = $replacements;
}
public function test($matches) {
// if you want you could do something funky to the matches array here
// if the key does not exists we are gonna start from the first
// array element again.
if(!array_key_exists($this->counter, $this->replacements)) {
$this->counter = 0;
}
// this will return your replacement.
return $this->replacements[$this->counter++];
}
}
// Instantiate your class here, and insert all your replacements in sequence
$obj = new myReplace(array('a', 'b'));
// Lets start the replacement :)
echo preg_replace_callback(
"/hi/i",
array($obj, 'test'),
"Hi mom, hi dad, hi son, hi someone"
);
?>
This code will result in:
a mom, b dad, a son, b someone
Related
I need to neatly output spun text in a php page.
I already have the prespun text in {hi|hello|greetings} format.
I have a php code that i found elsewhere, but it does not output the spun text on sentence level, where two {{ come.
Here is the code that needs fixing.
<?php
function spinText($text){
$test = preg_match_all("#\{(.*?)\}#", $text, $out);
if (!$test) return $text;
$toFind = Array();
$toReplace = Array();
foreach($out[0] AS $id => $match){
$choices = explode("|", $out[1][$id]);
$toFind[]=$match;
$toReplace[]=trim($choices[rand(0, count($choices)-1)]);
}
return str_replace($toFind, $toReplace, $text);
}
echo spinText("{Hello|Hi|Greetings}!");;
?>
The output will be randomly chose word: Hello OR Hi OR Greetings.
However, if there is a sentence level spinning, the output is messed up.
E.g.:
{{hello|hi}.{how're|how are} you|{How's|How is} it going}
The output is
{hello.how're you|How is it going}
As you can see the text has not been spun completely.
Thank you
This is a recursive problem, so regular expressions aren't that great; but recursive patterns can help though:
function bla($s)
{
// first off, find the curly brace patterns (those that are properly balanced)
if (preg_match_all('#\{(((?>[^{}]+)|(?R))*)\}#', $s, $matches, PREG_OFFSET_CAPTURE)) {
// go through the string in reverse order and replace the sections
for ($i = count($matches[0]) - 1; $i >= 0; --$i) {
// we recurse into this function here
$s = substr_replace($s, bla($matches[1][$i][0]), $matches[0][$i][1], strlen($matches[0][$i][0]));
}
}
// once we're done, it should be safe to split on the pipe character
$choices = explode('|', $s);
return $choices[array_rand($choices)];
}
echo bla("{{hello|hi}.{how're|how are} you|{How's|How is} it going}"), "\n";
See also: Recursive patterns
I want to extract numbers from a string in PHP like following :
if the string = 'make1to6' i would like to extract the numeric character before and after the 'to' substring in the entire string. i.e. 1 and 6 are to be extracted
i will be using these returned values for some calculations.' i would like to extract the numeric character before and after the 'to' substring in the entire string. i.e. 1 and 6 are to be extracted
The length of the string is not fixed and can be a max of 10 characters in length.The number can be of max two digits on either side of 'to' in the string.
Some example string values :
sure1to3
ic3to9ltd
anna1to6
joy1to4val
make6to12
ext12to36
thinking of something like :
function beforeTo(string) {
return numeric_value_before_'to'_in_the_string;
}
function afterTo(string) {
return numeric_value_after_'to'_in_the_string;
}
i will be using these returned values for some calculations.
You could use preg_match_all to achive this:
function getNumbersFromString($str) {
$matches = array();
preg_match_all('/([0-9]+)/', $str, $matches);
return $matches;
}
$matches = getNumbersFromString('hej 12jippi77');
Use preg_match with a regex that will extract the numbers for you. Something like this should do the trick for you:
$matches = null;
$returnValue = preg_match('/([\d+])to([\d+])/uis', 'ic3to9ltd', $matches);
After this $matches will look like:
array (
0 => '3to9',
1 => '3',
2 => '9',
);
You should read somewhat on regular expressions, it's not hard to do stuff like this if you know how they work. Will make your life easier. ;-)
You can use a regular expression as such, it should match exactly your specification:
$string = 'make6to12';
preg_match('{^.*?(?P<before>\d{1,2})to(?P<after>\d{1,2})}m', $string, $match);
echo $match['before'].', '.$match['after']; // 6, 12
You can use this:
// $str holds the string in question
if (preg_match('/(\d+)to(\d+)/', $str, $matches)) {
$number1 = $matches[1];
$number2 = $matches[2];
}
You can use regular expressions.
$string = 'make1to6';
if (preg_match('/(\d{1,10})to(\d{1,10})/', $string, $matches)) {
$number1 = (int) $matches[1];
$number2 = (int) $matches[2];
} else {
// Not found...
}
<?php
$data = <<<EOF
sure1to3
ic3to9ltd
anna1to6
joy1to4val
make6to12
ext12to36
EOF;
preg_match_all('#(\d+)to(\d+)#s', $data, $matches);
header('Content-Type: text/plain');
//print_r($matches);
foreach($matches as $match)
{
echo sprintf("%d, %d\n", $match[1], $match[2]);
}
?>
This is what Regular Expressions are for - you can match multiple instances of very specific patterns and have them returned to you in an array. It's pretty awesome, truth be told :)
Take a look here for how to use the built in regular expression methods in php : LINK
And here is a fantastic tool for testing regular expressions: LINK
<?php
list($before, $after) = explode('to', 'sure1to3');
$before_to = extract_ints($before);
$after_to = extract_ints($after);
function extract_ints($string) {
$ints = array();
$len = strlen($string);
for($i=0; $i < $len; $i++) {
$char = $string{$i};
if(is_numeric($char)) {
$ints[] = intval($char);
}
}
return $ints;
}
?>
A regex seems really unnecessary here since all you are doing is checking is_numeric() against a bunch of characters.
$string = 'test check one two test3';
$result = mb_eregi_replace ( 'test|test2|test3' , '<$1>' ,$string ,'i');
echo $result;
This should deliver: <test> check one two <test3>
Is it possible to get, that test and test3 was found, without using another match function ?
You can use preg_replace_callback instead:
$string = 'test check one two test3';
$matches = array();
$result = preg_replace_callback('/test|test2|test3/i' , function($match) use ($matches) {
$matches[] = $match;
return '<'.$match[0].'>';
}, $string);
echo $result;
Here preg_replace_callback will call the passed callback function for each match of the pattern (note that its syntax differs from POSIX). In this case the callback function is an anonymous function that adds the match to the $matches array and returns the substitution string that the matches are to be replaced by.
Another approach would be to use preg_split to split the string at the matched delimiters while also capturing the delimiters:
$parts = preg_split('/test|test2|test3/i', $string, null, PREG_SPLIT_DELIM_CAPTURE);
The result is an array of alternating non-matching and matching parts.
As far as I know, eregi is deprecated.
You could do something like this:
<?php
$str = 'test check one two test3';
$to_match = array("test", "test2", "test3");
$rep = array();
foreach($to_match as $val){
$rep[$val] = "<$val>";
}
echo strtr($str, $rep);
?>
This too allows you to easily add more strings to replace.
Hi following function used to found the any word from string
<?php
function searchword($string, $words)
{
$matchFound = count($words);// use tha no of word you want to search
$tempMatch = 0;
foreach ( $words as $word )
{
preg_match('/'.$word.'/',$string,$matches);
//print_r($matches);
if(!empty($matches))
{
$tempMatch++;
}
}
if($tempMatch==$matchFound)
{
return "found";
}
else
{
return "notFound";
}
}
$string = "test check one two test3";
/*** an array of words to highlight ***/
$words = array('test', 'test3');
$string = searchword($string, $words);
echo $string;
?>
If your string is utf-8, you could use preg_replace instead
$string = 'test check one two test3';
$result = preg_replace('/(test3)|(test2)|(test)/ui' , '<$1>' ,$string);
echo $result;
Oviously with this kind of data to match the result will be suboptimal
<test> check one two <test>3
You'll need a longer approach than a direct search and replace with regular expressions (surely if your patterns are prefixes of other patterns)
To begin with, the code you want to enhance does not seem to comply with its initial purpose (not at least in my computer). You can try something like this:
$string = 'test check one two test3';
$result = mb_eregi_replace('(test|test2|test3)', '<\1>', $string);
echo $result;
I've removed the i flag (which of course makes little sense here). Still, you'd still need to make the expression greedy.
As for the original question, here's a little proof of concept:
function replace($match){
$GLOBALS['matches'][] = $match;
return "<$match>";
}
$string = 'test check one two test3';
$matches = array();
$result = mb_eregi_replace('(test|test2|test3)', 'replace(\'\1\')', $string, 'e');
var_dump($result, $matches);
Please note this code is horrible and potentially insecure. I'd honestly go with the preg_replace_callback() solution proposed by Gumbo.
I want to CaPiTaLiZe $string in php, don't ask why :D
I made some research and found good answers here, they really helped me.
But, in my case I want to start capitalizing every odd character (1,2,3...) in EVERY word.
For example, with my custom function i'm getting this result "TeSt eXaMpLe" and want to getting this "TeSt ExAmPlE".
See that in second example word "example" starts with capital "E"?
So, can anyone help me? : )
Well I would just make it an array and then put it back together again.
<?php
$str = "test example";
$str_implode = str_split($str);
$caps = true;
foreach($str_implode as $key=>$letter){
if($caps){
$out = strtoupper($letter);
if($out <> " ") //not a space character
$caps = false;
}
else{
$out = strtolower($letter);
$caps = true;
}
$str_implode[$key] = $out;
}
$str = implode('',$str_implode);
echo $str;
?>
Demo: http://codepad.org/j8uXM97o
I would use regex to do this, since it is concise and easy to do:
$str = 'I made some research and found good answers here, they really helped me.';
$str = preg_replace_callback('/(\w)(.?)/', 'altcase', $str);
echo $str;
function altcase($m){
return strtoupper($m[1]).$m[2];
}
Outputs: "I MaDe SoMe ReSeArCh AnD FoUnD GoOd AnSwErS HeRe, ThEy ReAlLy HeLpEd Me."
Example
Here's a one liner that should work.
preg_replace('/(\w)(.)?/e', "strtoupper('$1').strtolower('$2')", 'test example');
http://codepad.org/9LC3SzjC
Try:
function capitalize($string){
$return= "";
foreach(explode(" ",$string) as $w){
foreach(str_split($w) as $k=>$v) {
if(($k+1)%2!=0 && ctype_alpha($v)){
$return .= mb_strtoupper($v);
}else{
$return .= $v;
}
}
$return .= " ";
}
return $return;
}
echo capitalize("I want to CaPiTaLiZe string in php, don't ask why :D");
//I WaNt To CaPiTaLiZe StRiNg In PhP, DoN'T AsK WhY :D
Edited: Fixed the lack of special characters in the output.
This task can be performed without using capture groups -- just use ucfirst().
This is not built to process multibyte characters.
Grab a word character then, optionally, the next character. From the fullstring match, only change the case of the first character.
Code: (Demo) (or Demo)
$strings = [
"test string",
"lado lomidze needs a solution",
"I made some research and found 'good' answers here; they really helped me."
]; // if not already all lowercase, use strtolower()
var_export(preg_replace_callback('/\w.?/', function ($m) { return ucfirst($m[0]); }, $strings));
Output:
array (
0 => 'TeSt StRiNg',
1 => 'LaDo LoMiDzE NeEdS A SoLuTiOn',
2 => 'I MaDe SoMe ReSeArCh AnD FoUnD \'GoOd\' AnSwErS HeRe; ThEy ReAlLy HeLpEd Me.',
)
For other researchers, if you (more simply) just want to convert every other character to uppercase, you could use /..?/ in your pattern, but using regex for this case would be overkill. You could more efficiently use a for() loop and double-incrementation.
Code (Demo)
$string = "test string";
for ($i = 0, $len = strlen($string); $i < $len; $i += 2) {
$string[$i] = strtoupper($string[$i]);
}
echo $string;
// TeSt sTrInG
// ^-^-^-^-^-^-- strtoupper() was called here
I need a simple word filter that will kill a script if it detects a filtered word in a string.
say my words are as below
$showstopper = array(badword1, badword2, badword3, badword4);
$yourmouth = "im gonna badword3 you up";
if(something($yourmouth, $showstopper)){
//stop the show
}
You could implode the array of badwords into a regular expression, and see if it matches against the haystack. Or you could simply cycle through the array, and check each word individually.
From the comments:
$re = "/(" . implode("|", $showstopper) . ")/"; // '/(badword1|badword2)/'
if (preg_match($re, $yourmouth) > 0) { die("foulmouth"); }
in_array() is your friend
$yourmouth_array = explode(' ',$yourmouth);
foreach($yourmouth_array as $key=>$w){
if (in_array($w,$showstopper){
// stop the show, like, replace that element with '***'
$yourmouth_array[$key]= '***';
}
}
$yourmouth = implode(' ',$yourmouth_array);
You might want to benchmark this vs the foreach and preg_match approaches.
$showstopper = array('badword1', 'badword2', 'badword3', 'badword4');
$yourmouth = "im gonna badword3 you up";
$check = str_replace($showstopper, '****', $yourmouth, $count);
if($count > 0) {
//stop the show
}
A fast solution involves checking the key as this does not need to iterate over the array. It would require a modification of your bad words list, however.
$showstopper = array('badword1' => 1, 'badword2' => 1, 'badword3' => 1, 'badword4' => 1);
$yourmouth = "im gonna badword3 you up";
// split words on space
$words = explode(' ', $yourmouth);
foreach($words as $word) {
// filter extraneous characters out of the word
$word = preg_replace('/[^A-Za-z0-9]*/', '', $word);
// check for bad word match
if (isset($showstopper[$word])) {
die('game over');
}
}
The preg_replace ensures users don't abuse your filter by typing something like bad_word3. It also ensures the array key check doesn't bomb.
not sure why you would need to do this but heres a way to check and get the bad words that were used
$showstopper = array(badword1, badword2, badword3, badword4);
$yourmouth = "im gonna badword3 you up badword1";
function badWordCheck( $var ) {
global $yourmouth;
if (strpos($yourmouth, $var)) {
return true;
}
}
print_r(array_filter($showstopper, 'badWordCheck'));
array_filter() returns an array of bad words, so if the count() of it is 0 nothign bad was said