I have a website connected to a web service and I need to recognize the characters received in my codes.
For instance, I receive a message like this :
$str = "Hello Europe";
or :
$str = "4 times !";
or :
$str = "452231";
or :
$str= "*Majid SH";
or ...
I want my code to understand the character which my message started by, and do the a function correspond to a special character.
For example, if it was started by a string, do function num1, or if it was started by '.' [dot], do function num2.
Thank you for helping me.
You can use substr() as follows:
Code:
$char1 = substr($str, 0, 1); //getting first character
if(is_numeric($char1){
//execute num1()
num1();
}
elseif ($char1 == '.') {
//execute num1()
num2();
}
I would use strpos()
<?php
$StringFromService;
$str = "Hello Europe";
$Search = strpos($StringFromService;, $str);
if ($Search === true) {
// run function
}
?>
You should use the switch If you want to find out if the character is a specific thing like a comma or period. Also understand that Strings can simply be thought of as Char arrays so you can simply call $str[0] to get the first char (See here.)
switch ($str[0]) {
case ",":
num1();
break;
case ".":
num2();
break;
}
You can keep making different cases to handle different situations. Just make sure you include a break between each case.
If you want to check if something is a string I believe there is an is_string but for that you may need to use substr as many other people have recommended because $str[0] I believe returns a char and not a string so it won't verify. The switch statement simply checks if the parameter is the same as the case using loose comparison. If you want more advanced checking, you'll probably need to use your own if statement to check or even regex. Hope this helps.
$str = 'value'; // value
$firstChar = substr($str, 0, 1);
if (is_numeric($firstChar)) {
// do something numeric'
} else if ($firstChar === '.') {
// do something dot'
} else {
// do something string'
}
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;
}
}
I am trying to remove the word "John" a certain number of times from a string. I read on the php manual that str_replace excepts a 4th parameter called "count". So I figured that can be used to specify how many instances of the search should be removed. But that doesn't seem to be the case since the following:
$string = 'Hello John, how are you John. John are you happy with your life John?';
$numberOfInstances = 2;
echo str_replace('John', 'dude', $string, $numberOfInstances);
replaces all instances of the word "John" with "dude" instead of doing it just twice and leaving the other two Johns alone.
For my purposes it doesn't matter which order the replacement happens in, for example the first 2 instances can be replaced, or the last two or a combination, the order of the replacement doesn't matter.
So is there a way to use str_replace() in this way or is there another built in (non-regex) function that can achieve what I'm looking for?
As Artelius explains, the last parameter to str_replace() is set by the function. There's no parameter that allows you to limit the number of replacements.
Only preg_replace() features such a parameter:
echo preg_replace('/John/', 'dude', $string, $numberOfInstances);
That is as simple as it gets, and I suggest using it because its performance hit is way too tiny compared to the tedium of the following non-regex solution:
$len = strlen('John');
while ($numberOfInstances-- > 0 && ($pos = strpos($string, 'John')) !== false)
$string = substr_replace($string, 'dude', $pos, $len);
echo $string;
You can choose either solution though, both work as you intend.
You've misunderstood the wording of the manual.
If passed, this will be set to the number of replacements performed.
The parameter is passed by reference and its value is changed by the function to indicate how many times the string was found and replaced. Its initial value is discarded.
There are a few things you could do to achieve this, but I can't think of one specific php function that will easily let you do this.
One option is to create your own replace function and utilize strripos and substr to do the replaces.
Another thing you can do is use preg_replace_callback and count the number of replacements you have done in the callback.
There's probably more ways but that's all I can think of on the fly. If performance is an issue I suggest you give both a try and do some simple benchmarks.
The cleanest, most-direct, single function call is to use preg_replace(). Its replacement limiting parameter makes the task intuitive and readable.
$string = preg_replace('/John/', 'dude', $string, $numberOfInstances);
The function is also attractive because making the search case-insensitive is as simple as adding the i pattern modifier to the end of the pattern. I won't delve into the usefulness of word boundaries (\b).
If a search string might contain characters with special meaning to the regex engine, then preg_quote() will be necessary -- this diminishes the beauty of the technique but not prohibitively so.
$search = '$5.99';
$pattern = '/' . preg_quote($search, '/') . '/';
$string = preg_replace($pattern, 'free', $string, $numberOfInstances);
For anyone who has an unnatural bias against regex functions, this can be done without regex and without looping -- it will be case-sensitive though.
Limited Explode & Implode: (Demo)
$numberOfInstances = 2;
$string = 'Hello John, how are you John. John are you happy with your life John?';
// explode here -^^^^ and ---------^^^^ only to create the following array:
// 0 => 'Hello ',
// 1 => ', how are you ',
// 2 => '. John are you happy with your life John?'
echo implode('dude', explode('John', $string, $numberOfInstances + 1));
Output:
Hello dude, how are you dude. John are you happy with your life John?
Notice the explode's limiting parameter dictates how many elements are generated, not how many explosions are executed on the string.
function str_replace_occurrences($find, $replace, $string, $count = -1) {
// current occrurence
$current = 0;
// while any occurrence
while (($pos = strpos($string, $find)) != false) {
// update length of str (size of string is changing)
$len = strlen($find);
// found next one
$current++;
// check if we've reached our target
// -1 is used to replace all occurrence
if($current <= $count || $count == -1) {
// do replacement
$string = substr_replace($string, $replace, $pos, $len);
} else {
// we've reached our
break;
}
}
return $string;
}
Artelius has already described how the function works, ill just show you how to do this via the manual methods:
function str_replace_occurrences($find,$replace,$string,$count = 0)
{
if($count == 0)
{
return str_replace($find,$replace,$string);
}
$pos = 0;
$len = strlen($find);
while($pos < $count && false !== ($pos = strpos($string,$find,$pos)))
{
$string = substr_replace($string,$replace,$pos,$len);
}
return $string;
}
This is untested but should work.
$var="UseCountry=1
UseCountryDefault=1
UseState=1
UseStateDefault=1
UseLocality=1
UseLocalityDefault=1
cantidad_productos=5
expireDays=5
apikey=ABQIAAAAFHktBEXrHnX108wOdzd3aBTupK1kJuoJNBHuh0laPBvYXhjzZxR0qkeXcGC_0Dxf4UMhkR7ZNb04dQ
distancia=15
AutoCoord=1
user_add_locality=0
SaveContactForm=0
ShowVoteRating=0
Listlayout=0
WidthThumbs=100
HeightThumbs=75
WidthImage=640
HeightImage=480
ShowImagesSystem=1
ShowOrderBy=0
ShowOrderByDefault=0
ShowOrderDefault=DESC
SimbolPrice=$
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).
I need help while trying to spin articles. I want to find text and replace synonymous text while keeping the case the same.
For example, I have a dictionary like:
hello|hi|howdy|howd'y
I need to find all hello and replace with any one of hi, howdy, or howd'y.
Assume I have a sentence:
Hello, guys! Shouldn't you say hello me when I say you HELLO?
After my operation it will be something like:
hi, guys! Shouldn't you say howd'y to me when I say howdy?
Here, I lost the case. I want to maintain it! It should actually be:
Hi, guys! Shouldn't you say howd'y to me when I say HOWDY?
My dictionary size is about 5000 lines
hello|hi|howdy|howd'y go|come
salaries|earnings|wages
shouldn't|should not
...
I'd suggest using preg_replace_callback with a callback function that examines the matched word to see if (a) the first letter is not capitalized, or (b) the first letter is the only capitalized letter, or (c) the first letter is not the only capitalized letter, and then replace with the properly modified replacement word as desired.
You can find your string and do two tests:
$outputString = 'hi';
if ( $foundString == ucfirst($foundString) ) {
$outputString = ucfirst($outputString);
} else if ( $foundString == strtoupper($foundString) ) {
$outputString = strtoupper($outputString);
} else {
// do not modify string's case
}
Here's a solution for retaining the case (upper, lower or capitalized):
// Assumes $replace is already lowercase
function convertCase($find, $replace) {
if (ctype_upper($find) === true)
return strtoupper($replace);
else if (ctype_upper($find[0]) === true)
return ucfirst($replace);
else
return $replace;
}
$find = 'hello';
$replace = 'hi';
// Find the word in all cases that it occurs in
while (($pos = stripos($input, $find)) !== false) {
// Extract the word in its current case
$found = substr($input, $pos, strlen($find));
// Replace all occurrences of this case
$input = str_replace($found, convertCase($found, $replace), $input);
}
You could try the following function. Be aware that it will only work with ASCII strings, as it uses some of the useful properties of ASCII upper and lower case letters. However, it should be extremely fast:
function preserve_case($old, $new) {
$mask = strtoupper($old) ^ $old;
return strtoupper($new) | $mask .
str_repeat(substr($mask, -1), strlen($new) - strlen($old) );
}
echo preserve_case('Upper', 'lowercase');
// Lowercase
echo preserve_case('HELLO', 'howdy');
// HOWDY
echo preserve_case('lower case', 'UPPER CASE');
// upper case
echo preserve_case('HELLO', "howd'y");
// HOWD'Y
This is my PHP version of the clever little perl function:
How do I substitute case insensitively on the LHS while preserving case on the RHS?
I'm doing some kind of own templates system. I want to change
<title>{site('title')}</title>
Into function "site" execution with parameter "title". Here's
private function replaceFunc($subject)
{
foreach($this->func as $t)
{
$args = explode(", ", preg_replace('/\{'.$t.'\(\'([a-zA-Z,]+)\'\)\}/', '$1', $subject));
$subject = preg_replace('/\{'.$t.'\([a-zA-Z,\']+\)\}/', call_user_func_array($t, $args), $subject);
}
return $subject;
}
Here's site:
function site($what)
{
global $db;
$s = $db->askSingle("SELECT * FROM ".DB_PREFIX."config");
switch($what)
{
case 'title':
return 'Title of page';
break;
case 'version':
return $s->version;
break;
case 'themeDir':
return 'lolmao';
break;
default:
return false;
}
}
I've tried to compare $what (which is for this case "title") with "title". MD5 are different. strcmp gives -1, "==", and "===" return false. What is wrong? ($what type is string. You can't change call_user_func_array into call_user_func, because later I'll be using multiple arguments)
Edit:
Strlen $what - strlen title
403 - 5
Heh - looks like I haven't cut the rest ;)
var_dump
string(403) "
title"
MD5 are diffrent. Strcmp gives -1,
"==", and "===" return false.
Throw in var_dump() and strlen()
And this function for especially hard cases:
function dump(&$str) {
$i=0;
while (isset($str[$i])) echo strtoupper(dechex(ord($str[$i++])));
}
Have you tried to trim the whitespaces?
$what = trim($what)
Maybe there is a trailing/beginning whitespace character. Also make sure they are both equally cased:
$what = strtolower(trim($what)) //trim and lower
Are you sure that there aren't any whitespaces? Use trim() to get rid of them. If the md5s are different the strings are different. var_dump(str_split($what)) will output the string char by char, if a whitespace isn't your problem maybe this helps.
I've tried to compare $what (which is for this case "title") with "title". MD5 are different.
That would suggest that $what is not "title". You should put in some debugging statements in there:
function site($what) {
var_dump($what);
die();
}
Check there's no extra spaces or characters you weren't expecting.