I have a string that contains multiple templated variables like this:
$str = "Hello ${first_name} ${last_name}";
How can I do to extract these variables in an array like this :
$array = ['first_name', 'last_name'];
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you can make string blade compatible and use string rendering method referenceBhaumik Pandhi– Bhaumik Pandhi2023-01-04 13:45:21 +00:00Commented Jan 4, 2023 at 13:45
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Actually I can't use string blade I have to use this format :/John– John2023-01-04 13:47:30 +00:00Commented Jan 4, 2023 at 13:47
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then you can write a custom string parser function. maybe this can help you.Bhaumik Pandhi– Bhaumik Pandhi2023-01-04 13:51:56 +00:00Commented Jan 4, 2023 at 13:51
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I'm trying to find a regex to detect this pattern and use preg_split() afterJohn– John2023-01-04 13:54:20 +00:00Commented Jan 4, 2023 at 13:54
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The variables will just be interpolated into the string by PHP, throwing an undefined variable notice if they don't exist, and a deprecation notice either way. What does this have to do with Laravel?miken32– miken322024-02-09 17:08:27 +00:00Commented Feb 9, 2024 at 17:08
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3 Answers
Use single quotes instead of double quotes when describing the string.
$str = 'Hello ${first_name} ${last_name}';
preg_match_all('/{(.*?)}/s', $str, $output_array);
dd($output_array[1]);
2 Comments
John
It's possible to get directly the good array without specify
[1] ?
cengsemihsahin
@John
0 is the full match. 1 is the first capture group. Each index is a capture group, after the full match which is always 0. see also: php.net/manual/en/function.preg-match-all.php if you don't want to specify index you can use end()Use explode function example given below:
$str = "Hello ${first_name} ${last_name}";
$str_to_array = explode("$",$str);
$array = array();
foreach($str_to_array as $data){
if (str_contains($data, '{')) {
$array[] = str_replace("}","",str_replace("{","",$data));
}
}
print_r($array);
1 Comment
John
Your solution is working. I'm searching for a solution with regex pattern for less code. But your solution is nice. You just have to specify that
str_contains is for php 8You can use a simple regular expression and use preg_match_all to find all the ocurrences, like this:
<?php
$pattern = '|\${.*?}|';
$subject = 'Hello ${first_name} ${last_name}';
$matches = '';
preg_match_all($pattern, $subject, $matches);
print_r($matches);
?>
Result:
Array
(
[0] => Array
(
[0] => ${first_name}
[1] => ${last_name}
)
)
EDIT: To get just the names of the variables, a small modification of the code will make it possible:
<?php
$pattern = '|\${(.*?)}|'; // We added parenthesis making '.*?' a sub-pattern now.
$subject = 'Hello ${first_name} ${last_name}';
$matches = '';
preg_match_all($pattern, $subject, $matches);
print_r($matches);
?>
Result:
Array
(
[0] => Array
(
[0] => ${first_name}
[1] => ${last_name}
)
[1] => Array
(
[0] => first_name
[1] => last_name
)
)
Now the first element of the result array contains the matched results for the full regex expression, and the second one contains the matched results for the sub-pattern.
1 Comment
John
It's a nice solution but how can I do to return only the variable name in the array ? I just need first_name and last_name