There is a string variable containing number data , say $x = "OP/99/DIR"; . The position of the number data may change at any circumstance by user desire by modifying it inside the application , and the slash bar may be changed by any other character ; but the number data is mandatory. How to replace the number data to a different number ? example OP/99/DIR is changed to OP/100/DIR.
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4 Answers
$string="OP/99/DIR";
$replace_number=100;
$string = preg_replace('!\d+!', $replace_number, $string);
print $string;
Output:
OP/100/DIR
Comments
Assuming the number only occurs once:
$content = str_replace($originalText, $numberToReplace, $numberToReplaceWith);
To change the first occurance only:
$content = str_replace($originalText, $numberToReplace, $numberToReplaceWith, 1);
Comments
Using regex and preg_replace
$x="OP/99/DIR";
$new = 100;
$x=preg_replace('/\d+/e','$new',$x);
print $x;
2 Comments
pheromix
it's quite the same as alexey's answer , so what's difference between using
! ?
Jithin
I used e modifier so that you can execute anything in the second parameter. Regarding !, there is no difference actually. Its just a delimiter. Check php.net/manual/en/regexp.reference.delimiters.php .
The most flexible solution is to use preg_replace_callback() so you can do whatever you want with the matches. This matches a single number in the string and then replaces it for the number plus one.
root@xxx:~# more test.php
<?php
function callback($matches) {
//If there's another match, do something, if invalid
return $matches[0] + 1;
}
$d[] = "OP/9/DIR";
$d[] = "9\$OP\$DIR";
$d[] = "DIR%OP%9";
$d[] = "OP/9321/DIR";
$d[] = "9321\$OP\$DIR";
$d[] = "DIR%OP%9321";
//Change regexp to use the proper separator if needed
$d2 = preg_replace_callback("(\d+)","callback",$d);
print_r($d2);
?>
root@xxx:~# php test.php
Array
(
[0] => OP/10/DIR
[1] => 10$OP$DIR
[2] => DIR%OP%10
[3] => OP/9322/DIR
[4] => 9322$OP$DIR
[5] => DIR%OP%9322
)
