Question 41180 in PHP Question posted in
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preg_match_all pattern from one array, subject from another – PHP

I have the following problem where I’m stuck for hours:
I have an array with my regex, where I want to match with the subject from another array.

Regex array:

Array
(
    [tax] => /^(S+w)/
    [net_amount] => /^((?:[1-9]d+|d).(?:[1-9]d+|d)(?:,dd)?)$/
    [tax_amount] => /^((?:[1-9]d+|d).(?:[1-9]d+|d)(?:,dd)?)$/
)

Subject array:

Array
(
    [0] => 10,00 % Steuer von
    [1] => 1.650,31
    [2] => 165,03
)

I don’t know how to match these two.

I tried quite things, such as:

foreach($pattern_val as $pattern_k3 => $pattern_val3) {
    $preg_pattern = $pattern_val3;
    foreach($file_content_array[$search_key] as $file_key => $file_value) {
        $preg_value = $file_value;
    }
    preg_match_all($preg_pattern, $preg_value, $matches, PREG_SET_ORDER, 0);
}

With this, I get just the last $preg_value in $matches.
I also tried some other methods but none weren’t successful.

Would appreciate any hint.
Thanks

Tags:

2

Answers


  1. 0

    It is not really clear what you are actually trying to achieve, what result you want to create. But this might point you into the right direction:

    <?php
$patterns = array_values([
    "tax" => '/^(S+w)/',
    "net_amount" => '/^((?:[1-9]d+|d).(?:[1-9]d+|d)(?:,dd)?)$/',
    "tax_amount" => '/^((?:[1-9]d+|d).(?:[1-9]d+|d)(?:,dd)?)$/',
]);
$subjects = array_values([
    0 => "10,00 % Steuer von",
    1 => "1.650,31",
    2 => "165,03",
]);
$result = [];
for ($i=0; $i<3; $i++) {
    preg_match($patterns[$i], $subjects[$i], $matches);
    $result[] = $matches[1];
}
print_r($result);

    That would be an alternative:

    <?php
$data = array_combine(
    [
        0 => "10,00 % Steuer von",
        1 => "1.650,31",
        2 => "165,03",
    ],
    [
        "tax" => '/^(S+w)/',
        "net_amount" => '/^((?:[1-9]d+|d).(?:[1-9]d+|d)(?:,dd)?)$/',
        "tax_amount" => '/^((?:[1-9]d+|d).(?:[1-9]d+|d)(?:,dd)?)$/',
    ]
);
$result = [];
array_walk($data, function($pattern, $subject) use (&$result) {
    preg_match($pattern, $subject, $matches);
    $result[] = $matches[1];    
});
print_r($result);

    Both variants create the same output:

    Array
(
    [0] => 10,00
    [1] => 1.650,31
    [2] => 165,03
)
    Login or Signup to reply.
  2. 0

    PHP’s preg_replace_callback() accepts arrays for patterns and subjects and you don’t need to return a replacement string if you don’t want to, leaving you free to do whatever you want inside the callback function. Like appending to a result array you defined beforehand. For example:

    $results = [];

preg_replace_callback($patterns, function ($matches) use (&$results) { 
    $results[] = $matches[1]; // match of the first capturing group
}, $subjects);

    $results for your test data:

    Array
(
    [0] => 10,00
    [1] => 1.650,31
    [2] => 165,03
)
    Login or Signup to reply.
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