PHP associative array values replace string variable

Question

I have a string as:

$string = "My name is {name}. I live in {detail.country} and age is {detail.age}";

and I have an array like that and it will be always in that format.

$array = array(
   'name' => 'Jon',
   'detail' => array(
     'country' => 'India',
     'age' => '25'
  )
);

and the expected output should be like :

My name is Jon. I live in India and age is 25

So far I tried with the following method:

$string = str_replace(array('{name}','{detail.country}','{detail.age}'), array($array['name'],$array['detail']['country'],$array['detail']['age']));

But the thing is we can not use the plain text of string variable. It should be dynamic on the basis of the array keys.

You might consider using Twig.

Alex Howansky
– Alex Howansky

2019-03-08 15:44:46 +00:00
Commented Mar 8, 2019 at 15:44 — Alex Howansky
– Alex Howansky, Commented Mar 8, 2019 at 15:44

Kévin Bibollet · Accepted Answer · 2019-03-08 15:38:48Z

3

You can use preg_replace_callback() for a dynamic replacement:

$string = preg_replace_callback('/{([\w.]+)}/', function($matches) use ($array) {
    $keys = explode('.', $matches[1]);
    $replacement = '';

    if (sizeof($keys) === 1) {
        $replacement = $array[$keys[0]];
    } else {
        $replacement = $array;

        foreach ($keys as $key) {
            $replacement = $replacement[$key];
        }
    }

    return $replacement;
}, $string);

It also exists preg_replace() but the above one allows matches processing.

answered Mar 8, 2019 at 15:38

Kévin Bibollet

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Comments

Romain B. · Accepted Answer · 2019-03-08 15:38:38Z

2

You can use a foreach to achieve that :

foreach($array as $key=>$value)
{
  if(is_array($value))
  {
      foreach($value as $key2=>$value2)
      {
           $string = str_replace("{".$key.".".$key2."}",$value2,$string); 
      }
  }else{
      $string = str_replace("{".$key."}",$value,$string);
  }
}
print_r($string);

The above will only work with a depth of 2 in your array, you'll have to use recurcivity if you want something more dynamic than that.

answered Mar 8, 2019 at 15:38

Romain B.

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Comments

Anuga · Accepted Answer · 2019-03-08 15:47:01Z

Here's a recursive array handler: http://phpfiddle.org/main/code/e7ze-p2ap

<?php

function replaceArray($oldArray, $newArray = [], $theKey = null) {
    foreach($oldArray as $key => $value) {
        if(is_array($value)) {
            $newArray = array_merge($newArray, replaceArray($value, $newArray, $key));
        } else {
            if(!is_null($theKey)) $key = $theKey . "." . $key;
            $newArray["{" . $key . "}"] = $value;
        }
    }
    return $newArray;
}

$array = [
   'name' => 'Jon',
   'detail' => [
     'country' => 'India',
     'age' => '25'
  ]
];
$string = "My name is {name}. I live in {detail.country} and age is {detail.age}";

$array = replaceArray($array);

echo str_replace(array_keys($array), array_values($array), $string);

?>

A. 0078 · Accepted Answer · 2019-03-08 15:42:07Z

-3

echo "my name is ".$array['name']." .I live in ".$array['detail']['countery']." and my age is ".$array['detail']['age'];

answered Mar 8, 2019 at 15:42

A. 0078

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1 Comment

Anuga Over a year ago

Not very dynamic.

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