preg replace for needed value - php

Question

I use coordinates for shops and manually add the coordinates as lang and long to database. Sometimes by mistake, approving the coordinate.
Let me exlain by an example.
For example;
Lang is 33.4534543543 .But by mistake sometimes i push keyboard and it becomes like,
33.4534543543<
or
33.4534543543,
or
,(space)33.4534543543<
How can I get only the 33.4534543543?

Answer 1

preg_match_all
To find matches from a string containing multiple matches, you would use preg_match_all:
$strings = "33.4534543543<
33.4534543543,
, 33.4534543543<";
$pattern = "!(\d+\.\d+)!";
preg_match_all($pattern,$strings,$matches);
print_r($matches[0]);
Output
Array
(
[0] => 33.4534543543
[1] => 33.4534543543
[2] => 33.4534543543
)
preg_match
To find the match from a single string you could use preg_match.
$string = "33.4534543543<";
$pattern = "!(\d+\.\d+)!";
if(preg_match($pattern,$string,$match)){
print($match[0]);
}
Output
33.4534543543
preg_replace
To replace anything that is not what you want in your existing string you would use preg_replace:
$string = preg_replace('![^\d.]!','',$string);
An example:
$strings = "33.4534543543<
33.4534543543,
, 33.4534543543<";
$strings_exp = explode("\n",$strings);
$output = '';
foreach($strings_exp as $string){
$output.= "String '$string' becomes ";
$new_string = preg_replace('![^0-9.]!','',$string);
$output.= "'$new_string'\n";
}
echo $output;
output
String '33.4534543543<' becomes '33.4534543543'
String '33.4534543543,' becomes '33.4534543543'
String ', 33.4534543543<' becomes '33.4534543543'

Answer 2

Sound like you want to do a preg_match: http://phpfiddle.org/main/code/z6q-a1d
$old_vals = array(
'33.4534543543<',
'33.4534543543,',
', 33.4534543543<'
);
$new_vals = array();
foreach ($old_vals as $val) {
preg_match('(\d*\.?\d+)',$val, $match);
array_push($new_vals, $match[0]);
}
print_r($new_vals);
Output
Array (
[0] => 33.4534543543,
[1] => 33.4534543543,
[2] => 33.4534543543
)