Letter numeration ('A','B','C', etc.) from digit in PHP [closed] - php

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What is the PHP function to get letter (1 char symbol), based on it position.
Like 0 position - a, 1st - b, etc.
I tried this:
"a"+5
I was expecting f but I get 5 instead.


I think you want to use chr() and/or ord() functions. Something like:
echo chr( ord("a") + $i );


$alphabet = range('a', 'z');
echo array_search('b', $alphabet); // 1


Try this chr() and/or ord() functions.
Some like:
print chr( ord("x") + $z );

Related

count amount of numbers in a string [closed]

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I have a array of random generated strings looking like this:
63njpn5u
byrtg1za
ht6wnz39
em1yyrju
2ytoxfxl
n5kaho14
zg92pg4n
gr9e7i01
u3t07ai4
I need a php code that will cycle trough these and output the ones back that contain one number. So in the example above I would've gotten back:
2ytoxfxl
em1yyrju
byrtg1za
I've tried using preg_match_all but I cant figure out how to use this with a array.

What you need is preg_grep:
print_r(preg_grep('/^\D*\d\D*$/', $your_array));

You can count like using string method :
$string = "2ytoxfx3l";
echo $int = strlen(intval(preg_replace('/[^0-9]+/', '', $string), 10));
Group of element:
$string = array( "63njpn5u","byrtg1za","ht6wnz39");
foreach($string as $str){
echo strlen(intval(preg_replace('/[^0-9]+/', '', $str), 10));
}

PHP number: decimal point visible only decimal point [closed]

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PHP number: decimal point visible only if needed
This Example using i want to 105.54 "-" Rremove
$foo = "-105.5457";
echo number_format((float)$foo, 2, '.', '');
want to 105.54

not clear enough...
echo number_format(abs((float)$foo), 2, '.', '');
?

Try use abs() "Returns the absolute value of number. " :)

Try this
$foo = "-105.5457";
echo number_format(str_replace('-','',$foo),2,'.','');

PHP: Replace php code in string [closed]

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I want replace php codes in string and running fro server
$x = 1;
$string = "OK:{first}Yes{second}No";
I want replace if($x == 1){ to {first} and } else { to {second}
After run and echo $string , I want result in html :
OK:Yes

How did you come up with this approach? Why not simply:
$string = $x == 1 ? 'OK:Yes' : 'OK:No';
That would get you the string you want based on the value of $x.
Also if you literally mean that you want to do a search-n-replace on the PHP code itself (as #OllyTenerife assumes), then are you going to write it into a file to be executed later, or use eval() or something? Doesn't sound like the right track there... In which case, remodel your code.

$string = str_replace("{first}","if($x == 1)",$string);
$string = str_replace("{second}","} else {",$string);

Split Float & Replace Integer PHP [closed]

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I have float values in an array... Let's say one of my values is:
5.1234
How do I SWAP the integer in the float. So in the example above, I'd like to swap the 5 with 8. Therefore the new number would be:
8.1234
This needs to be a SWAP, not a mathematical addition as in 5.1234 + 3.
I basically need to split the number in two, the integer (5) and the float value following it (.1234), swap the 5 for the 8 and the recombine them to get 8.1234.
What is the fastest and most elegant way to do this in PHP since I'll be using this on a LOT of data?
To clarify WHY math cannot be used: This is because this is an obj file that's looking for an usemtl library title (Mudbox compliant) from which it extracts the UV space. Then it changes the vert U (or V) accordingly. Problem is these faces may come up more than once. This would make the operation cumulative, which it is NOT. All it needs to do is substituted the integer.

<?php
$number = 5.1234;
$array = explode(".", $number);
// $array[0] contains 5
$newNumber = 8;
$array[0] = $newNumber;
$finalString = $array[0] . '.' . $array[1];
$finalFloat = floatval($finalString); // String to float
echo $finalFloat;
?>
Here is how I would do this. This solution is relevant if you are sure the number will always be formated like followed :
[number].[decimals]
Else you will not be able to always replace the number before the dot.

Create serial number with 8 length digits [closed]

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i want to create a format like this: 0000-0000. I already i have the unique number, but i need to merge it with my format type.
$my_id_unique = '60';
//some function....
//IT SHOULD OUTPUT LIKE THIS
$create_serial = '0000-0060';

$x = sprintf("%08d",$my_id_unique);
$create_serial = substr($x,0,4).'-'.substr($x,4);

With oneliner:
$create_serial = implode('-', str_split(sprintf('%08d', $my_id_unique), 4));

Or you could use str_pad:
echo str_pad('60', 9, '0000-0000', STR_PAD_LEFT);

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