php regex to match key value pairs - php

Question

I have a string like as below.
$string = "height=175cm weight=70kgs age=25yrs"
String contents are key value pairs each pair are separated by a Tab. I want each key value pairs as separate variable and prints out each.
I have tried with below code but i am not getting proper result please help me where i went wrong.
$string = "height=175cm weight=70kgs age=25yrs";
$pattern = "(([^=]*)\s*=\s*(.*))";
if (preg_match($pattern,$string,$match)) {
echo "<pre>";
print_r($match);
} else {
echo "not matche\n";
}
Result:
Array
(
[0] => height=175cm weight=70kgs age=25yrs
[1] => height
[2] => 175cm weight=70kgs age=25yrs
)

Answer 1

You can use this code:
$string = "height=175cm weight=70kgs age=25yrs";
if (preg_match_all('/\s*([^=]+)=(\S+)\s*/', $string, $matches)) {
$output = array_combine ( $matches[1], $matches[2] );
print_r($output);
}
OUTPUT:
Array
(
[height] => 175cm
[weight] => 70kgs
[age] => 25yrs
)

Answer 2

You can use this:
$string = "height=175cm weight=70kgs age=25yrs";
$pattern = "/(\w+)=(\d+)(\w+)/i";
if(preg_match_all($pattern,$string,$match))
{
var_dump($match);
}
Result:
array(4) {
[0]=>
array(3) {
[0]=>
string(12) "height=175cm"
[1]=>
string(12) "weight=70kgs"
[2]=>
string(9) "age=25yrs"
}
[1]=>
array(3) {
[0]=>
string(6) "height"
[1]=>
string(6) "weight"
[2]=>
string(3) "age"
}
[2]=>
array(3) {
[0]=>
string(3) "175"
[1]=>
string(2) "70"
[2]=>
string(2) "25"
}
[3]=>
array(3) {
[0]=>
string(2) "cm"
[1]=>
string(3) "kgs"
[2]=>
string(3) "yrs"
}
}

Answer 3

I've pasted a code sample below which helps you to solve your problem. Certainly, it is not very tightly compressed and has quite a few more lines of code than the other answers (which are all good answers!).
The reason I did this was because it looks like you may benefit from an explanation that takes you one step at a time in the progression of solving your problem, so that you can understand what is happening along the way.
Here's the code you can use:
<?php
$string = "height=175cm\tweight=70kgs\tage=25yrs";
// Divide your string into an array, with each element
// in the array being a string with a key-value pair
$pairs = explode("\t", $string);
// See what the array of pair strings looks like.
// print_r($pairs);
// Create an array to get it ready to hold key-value pairs.
$results = array();
// For each string in your array, split at the equal sign
// and set values in the $results array.
foreach ($pairs as $pair) {
$exploded_pair = explode("=", $pair);
// See what each exploded pair array looks like.
// print_r($exploded_pair);
$key = $exploded_pair[0];
$value = $exploded_pair[1];
$results[$key] = $value;
}
print_r($results);
Instead of using regular expressions, this makes use of the explode function in PHP. You can read the documentation on explode found here.
You said that your input string is separated by tabs, which is why the assignment statement for $string has \t instead of spaces. If you were to use spaces instead of tabs, then make sure that you change
$pairs = explode("\t", $string);
to
$pairs = explode(" ", $string);