PHP Extract numbers from a string - php

Question

I want to extract numbers from a string in PHP like following :
if the string = 'make1to6' i would like to extract the numeric character before and after the 'to' substring in the entire string. i.e. 1 and 6 are to be extracted
i will be using these returned values for some calculations.' i would like to extract the numeric character before and after the 'to' substring in the entire string. i.e. 1 and 6 are to be extracted
The length of the string is not fixed and can be a max of 10 characters in length.The number can be of max two digits on either side of 'to' in the string.
Some example string values :
sure1to3
ic3to9ltd
anna1to6
joy1to4val
make6to12
ext12to36
thinking of something like :
function beforeTo(string) {
return numeric_value_before_'to'_in_the_string;
}
function afterTo(string) {
return numeric_value_after_'to'_in_the_string;
}
i will be using these returned values for some calculations.

Answer 1

You could use preg_match_all to achive this:
function getNumbersFromString($str) {
$matches = array();
preg_match_all('/([0-9]+)/', $str, $matches);
return $matches;
}
$matches = getNumbersFromString('hej 12jippi77');

Answer 2

Use preg_match with a regex that will extract the numbers for you. Something like this should do the trick for you:
$matches = null;
$returnValue = preg_match('/([\d+])to([\d+])/uis', 'ic3to9ltd', $matches);
After this $matches will look like:
array (
0 => '3to9',
1 => '3',
2 => '9',
);
You should read somewhat on regular expressions, it's not hard to do stuff like this if you know how they work. Will make your life easier. ;-)

Answer 3

You can use a regular expression as such, it should match exactly your specification:
$string = 'make6to12';
preg_match('{^.*?(?P<before>\d{1,2})to(?P<after>\d{1,2})}m', $string, $match);
echo $match['before'].', '.$match['after']; // 6, 12

Answer 4

You can use this:
// $str holds the string in question
if (preg_match('/(\d+)to(\d+)/', $str, $matches)) {
$number1 = $matches[1];
$number2 = $matches[2];
}

Answer 5

You can use regular expressions.
$string = 'make1to6';
if (preg_match('/(\d{1,10})to(\d{1,10})/', $string, $matches)) {
$number1 = (int) $matches[1];
$number2 = (int) $matches[2];
} else {
// Not found...
}

Answer 6

<?php
$data = <<<EOF
sure1to3
ic3to9ltd
anna1to6
joy1to4val
make6to12
ext12to36
EOF;
preg_match_all('#(\d+)to(\d+)#s', $data, $matches);
header('Content-Type: text/plain');
//print_r($matches);
foreach($matches as $match)
{
echo sprintf("%d, %d\n", $match[1], $match[2]);
}
?>

Answer 7

This is what Regular Expressions are for - you can match multiple instances of very specific patterns and have them returned to you in an array. It's pretty awesome, truth be told :)
Take a look here for how to use the built in regular expression methods in php : LINK
And here is a fantastic tool for testing regular expressions: LINK

Answer 8

<?php
list($before, $after) = explode('to', 'sure1to3');
$before_to = extract_ints($before);
$after_to = extract_ints($after);
function extract_ints($string) {
$ints = array();
$len = strlen($string);
for($i=0; $i < $len; $i++) {
$char = $string{$i};
if(is_numeric($char)) {
$ints[] = intval($char);
}
}
return $ints;
}
?>
A regex seems really unnecessary here since all you are doing is checking is_numeric() against a bunch of characters.