PHP associative array values replace string variable - php

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.

Answer 1

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.

Answer 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.

Answer 3

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);
?>

Answer 4

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