Replace First Character PHP

Question

I want to check user input in the textbox. If the first character is a zero, it will be replaced with +63 . But it should not replace all the zeroes in the string. I had search through sites but most are about replacing all of the occurrences. Thanks a lot!

Answer 1

JavaScript solution

var str = "000123";
var foo = str.replace(/^0/,"+63");
alert(foo);

Basic regular expression

• ^ - match beginning of a string
• 0 - match the number zero

PHP Solution

$string = '000123';
$pattern = '/^0/';
$replacement = '+63';
echo preg_replace($pattern, $replacement, $string);

Answer 2

In PHP:

<?php 
$ptn = "/^0/";  // Regex
$str = "01234"; //Your input, perhaps $_POST['textbox'] or whatever
$rpltxt = "+63";  // Replacement string
echo preg_replace($ptn, $rpltxt, $str);
?>

Would echo out:

+631234

Of course, you'll want to validate the input and everything, but that's how you'd replace it after it's been submitted.

Answer 3

Something like this:

if(oldStr.charAt(0) == "0") {
  newStr= oldStr.replace(oldStr.charAt(0), "+63");
}

Btw its JS solution

Answer 4

I recommend avoid Regex in your code if you can due to performance overhead. It's easy to make it in PHP without Regex:

if($str[0] == "0"){
    $str = substr_replace($str,'+63',0,1);
}

Answer 5

 $numbers='012345';

1.first check the first digit is zero or not,

 if (preg_match('/^0/', $numbers))

2.if zero,then remove zero and add the required data with the variable

$str=ltrim ($numbers, '0');
$mobile ='+63'.$str;

so the output will be,

          +6312345

Answer 6

If I understand everything correctly this should work for you:

<input type="text" id="txt" value="0 is the score" />

Javascript:

​var str = document.getElementById("txt").value;
if(str[0] === '0') {
 document.getElementById("txt").value = "63" + str.substring(1);
}

See demo : http://jsfiddle.net/rZ3vm/

Also see string functions in javascript and the substring function.

Answer 7

var str = "000123";
var foo = str.charAt(0).replace("0","+63") + str.substr(1);
alert(foo);

Answer 8

Some thing like this ....

var string = "0230234";

var newString = string.indexOf('0') == 0 ? string.substring(1) : string;

newString = "+63"+newString 

alert(newString); // +63230234

Answer 9

str=(str.charAt(0)=='0')?(str.replace(str.charAt(0),"+63")):str;

检查一下