Not sure why I would be getting the following warning, giving the that data being used in this row column is alpha-numeric.
[20-Jan-2023 10:13:10 America/Chicago] PHP Warning: strpos(): Offset not contained in string in /www/zendphp74/htdocs/IP Lookup/getIPAddress on line 345
$str = strval($row[TIME_IN_IP_ADDRESS]);
$timeInIP = substr($str, 0, strpos($str, '.', strpos($str, '.')+1));
if ($timeInIP === '10.390'){
return 'USA';
}
You could use explode() function instead of strpos() function to break the IP address into an array then you can add checks.
Use the following code.
$ipArr = explode(".", $row[TIME_IN_IP_ADDRESS]);
$timeInIP = $ipArr[0] . "." . $ipArr[1];
if ($timeInIP === "10.390") {
return "USA";
}
Related
// lookup all hints from array if $q is different from ""
if ($q !== "") {
$q = strtolower($q);
$len=strlen($q);
foreach($a as $name) {
if (stristr($q, substr($name, 0, $len))) {
if ($hint === "") {
$hint = $name;
} else {
$hint .= ", $name";
}
}
}
}
The full thing is located at: http://www.w3schools.com/ajax/ajax_php.asp?
I don't really understand the part from the foreach and under but everything else including the ajax is understandable. Can someone explain mainly the
if (stristr($q, substr($name, 0, $len))) {
This is the only real roblem, I don't get. What exactly is this line doing :) Thanks
Thanks
IF block is executed if $q contains string $name length between 0 to length of $q.
For example if $q = "hello world" and $name = "hello" then IF is executed.
if $q = "hello world" and $name = "world" then If is not executed.
$len variable come's from your request length.
If you'r request is Hege len will be 4;
$name is one of them array value.
substr function getting array element with query lenght.
For example in our case our query length is 4. Second array element is Brittany from substr function we will get only brit stristr function will check Hege and Brti is equal or not.
here code start with
foreach($a as $name)
--> which will loop all names stored in $a array as $name.
--> and then substr($name, 0, $len).
where $len is the length of your query string parameter.
so, finally substr($name, 0, $len) return only that portion of string from stored name array starting from 0 to your query string length.
and after that stristr function.
which will find the first occurrence of your query string inside the returned portion of string from your stored name arrays with substr function and finally return the rest of the string.
so, at last $hint is initially blank variable. So at the end of the loop if only one match found then it only display single name and if more than one match found then it will display name with comma seprated.
I have a string like this:
9.018E-14
Now I want to convert to this to the normal decimal numbers.
MyGeekPal has a nice article on it.
Code:
<?php
$total_time = 2.8848648071289E-5;
echo exp2dec($total_time);
function exp2dec($number) {
preg_match('/(.*)E-(.*)/', str_replace(".", "", $number), $matches);
$num = "0.";
while ($matches[2] > 0) {
$num .= "0";
$matches[2]--;
}
return $num . $matches[1];
}
?>
If your input is a float
If you have $number = 0.00023459 then printing this value in PHP will probably result in this exponential format. It doesn't mean the variable is stored that way; it's just an output artefact.
Use printf to work around this and gain control over your numeric output.
If your input is a string
Why the complexity?
$matches = Array();
if (preg_match('/(.*)E-(.*)/', $number, $matches)) {
$number = $matches[1] * pow(10, -1*$matches[2]);
}
Though you can tighten up the regex a bit:
$matches = Array();
if (preg_match('/(\d+(?:\.\d+)?)E(-?\d+)/i', $number, $matches)) {
$number = (float)$matches[1] * pow(10, (int)$matches[2]);
}
Live demo
EDIT: Here is some PHP magic:
$stringval = "12e-3";
$numericval = 0 + $stringval;
From the PHP docs:
If the string does not contain any of the characters '.', 'e', or 'E' and the numeric value fits into integer type limits (as defined by PHP_INT_MAX), the string will be evaluated as an integer. In all other cases it will be evaluated as a float.
If you need a more flexible format (e.g. extract four numbers from the same string), use sscanf like this:
$stringval = "12e-3";
$numericval = sscanf($stringval, "%f")[0];
echo $numericval;
I have a string I get from a website.
A portion of the string is "X2" I want to add +1 to 2.
The entire string I get is:
20120815_00_X2
What I want is to add the "X2" +1 until "20120815_00_X13"
You can do :
$string = '20120815_00_X2';
$concat = substr($string, 0, -1);
$num = (integer) substr($string, -1);
$incremented = $concat . ($num + 1);
echo $incremented;
For more informations about substr() see => documentation
You want to find the number at the end of your string and capture it, test for a maximum value of 12 and add one if that's the case, so your pattern would look something like:
/(\d+)$/ // get all digits at the end
and the whole expression:
$new = preg_replace('/(\d+)$/e', "($1 < 13) ? ($1 + 1) : $1", $original);
I have used the e modifier so that the replacement expression will be evaluated as php code.
See the working example at CodePad.
This solution works (no matter what the number after X is):
function myCustomAdd($string)
{
$original = $string;
$new = explode('_',$original);
$a = end($new);
$b = preg_replace("/[^0-9,.]/", "", $a);
$c = $b + 1;
$letters = preg_replace("/[^a-zA-Z,.]/", '', $a);
$d = $new[0].'_'.$new[1].'_'.$letters.$c;
return $d;
}
var_dump(myCustomAdd("20120815_00_X13"));
Output:
string(15) "20120815_00_X14"
Let's say I have two strings.
$needle = 'AGUXYZ';
$haystack = 'Agriculture ID XYZ-A';
I want to count how often characters that are in $needle occur in $haystack. In $haystack, there are the characters 'A' (twice), 'X', 'Y' and 'Z', all of which are in the needle, thus the result is supposed to be 5 (case-sensitive).
Is there any function for that in PHP or do I have to program it myself?
Thanks in advance!
You can calculate the length of the original string and the length of the string without these characters. The differences between them is the number of matches.
Basically,
$needle = 'AGUXYZ';
$haystack = 'Agriculture ID XYZ-A';
Here is the part that does the work. In one line.
$count = strlen($haystack) - strlen(str_replace(str_split($needle), '', $haystack));
Explanation: The first part is self-explanatory. The second part is the length of the string without the characters in the $needle string. This is done by replacing each occurrences of any characters inside the $needle with a blank string.
To do this, we split $needle into an array, once character for each item, using str_split. Then pass it to str_replace. It replaces each occurence of any items in the $search array with a blank string.
Echo it out,
echo "Count = $count\n";
you get:
Count = 5
Try this;
function count_occurences($char_string, $haystack, $case_sensitive = true){
if($case_sensitive === false){
$char_string = strtolower($char_string);
$haystack = strtolower($haystack);
}
$characters = str_split($char_string);
$character_count = 0;
foreach($characters as $character){
$character_count = $character_count + substr_count($haystack, $character);
}
return $character_count;
}
To use;
$needle = 'AGUXYZ';
$haystack = 'Agriculture ID XYZ-A';
print count_occurences($needle, $haystack);
You can set the third parameter to false to ignore case.
There's no built-in function that handles character sets, but you simply use the substr_count function in a loop as such:
<?php
$sourceCharacters = str_split('AGUXYZ');
$targetString = 'Agriculture ID XYZ-A';
$occurrenceCount = array();
foreach($sourceCharacters as $currentCharacter) {
$occurrenceCount[$currentCharacter] = substr_count($targetString, $currentCharacter);
}
print_r($occurrenceCount);
?>
There is no specific method to do this, but this built in method can surely help you:
$count = substr_count($haystack , $needle);
edit: I just reported the general substr_count method..in your particular case you need to call it for each character inside $needle (thanks #Alan Whitelaw)
If you are not interested in the character distribution, you could use a Regex
echo preg_match_all("/[$needle]/", $haystack, $matches);
which returns the number of full pattern matches (which might be zero), or FALSE if an error occurred. The solution offered by #thai above should be significantly faster though.
If the character distribution is of any importance, you can use count_chars:
$needle = 'AGUXYZ';
$haystack = 'Agriculture ID XYZ-A';
$occurences = array_intersect_key(
count_chars($haystack, 1),
array_flip(
array_map('ord', str_split($needle))
)
);
The result would be an array with keys being the ASCII values of the character.
You can then iterate over it with
foreach($occurences as $char => $amount) {
printf("There is %d occurences of %s\n", $amount, chr($char));
}
You could still pass the $occurences array to array_sum to calculate the total.
substr_count will get you close. However, it will not do individual characters. So you could loop over each character in $needle and call this function while summing the counts.
There is a PHP function substr_count to count the number of instances of a character in a string. It would be trivial to extend it for multiple characters:
function substr_multi_count ($haystack, $needle, $offset = 0, $length = null) {
$ret = 0;
if ($length === null) {
$length = strlen($haystack) - $offset;
}
for ($i = strlen($needle); $i--; ) {
$ret += substr_count($haystack, $needle, $offset, $length);
}
return $ret;
}
I have a recursive method to overcome this:
function countChar($str){
if(strlen($str) == 0) return 0;
if(substr($str,-1) == "x") return 1 + countChar(substr($str,0,-1));
return 0 + countChar(substr($str,0,-1));
}
echo countChar("xxSR"); // 2
echo countChar("SR"); // 0
echo countChar("xrxrpxxx"); // 5
I'd do something like:
split the string to chars (str_split), and then
use array_count_values to get an array of characters with the respective number of occurrences.
Code:
$needle = 'AGUXYZ';
$string = "asdasdadas asdadas asd asdsd";
$array_chars = str_split($string);
$value_count = array_count_values($array_chars);
for ($i = 0; $i < count($needle); $i++)
echo $needle[$i]. " is occur " .
($value_count[$needle[$i]] ? $value_count[$needle[$i]] : '0')." times";
Just looked at function
str_pad($input, $pad_length, $pad_str, [STR_PAD_RIGHT, STR_PAD_LEFT, or STR_PAD_BOTH])
which helps to pad some string on left, right or on both sides of a given input.
Is there any php function which I can use to insert a string inside an input string?
for example ..
$input = "abcdef";
$pad_str = "#";
so if I give insert index 3, it inserts "#" after first 3 left most characters and $input becomes "abc#def".
thanks
You're looking for a string insert, not a padding.
Padding makes a string a set length, if it's not already at that length, so if you were to give a pad length 3 to "abcdef", well it's already at 3, so nothing should happen.
Try:
$newstring = substr_replace($orig_string, $insert_string, $position, 0);
PHP manual on substr_replace
you need:
substr($input, 0, 3).$pad_str.substr($input, 3)
Bah, I misread the question. You want a single insert, not insert every X characters. Sorry.
I'll leave it here so it's not wasted.
You can use regular expressions and some calculation to get your desired result (you probably could make it with pure regexp, but that would be more complex and less readable)
vinko#mithril:~$ more re.php
<?php
$test1 = "123123123";
$test2 = "12312";
echo puteveryXcharacters($a,"#",3);
echo "\n";
echo puteveryXcharacters($b,"#",3);
echo "\n";
echo puteveryXcharacters($b,"$",3);
echo "\n";
function puteveryXcharacters($str,$wha,$cnt) {
$strip = false;
if (strlen($str) % $cnt == 0) {
$strip = true;
}
$tmp = preg_replace('/(.{'.$cnt.'})/',"$1$wha", $str);
if ($strip) {
$tmp = substr($tmp,0,-1);
}
return $tmp;
}
?>
vinko#mithril:~$ php re.php
123#123#123
123#12
123$12