preg_match_all pattern from one array, subject from another-CodePudding

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)(?:\,\d\d)?)$/
    [tax_amount] => /^((?:[1-9]\d |\d).(?:[1-9]\d |\d)(?:\,\d\d)?)$/
)

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

CodePudding user response：

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
$patterns = array_values([
    "tax" => '/^(\S \w)/',
    "net_amount" => '/^((?:[1-9]\d |\d).(?:[1-9]\d |\d)(?:\,\d\d)?)$/',
    "tax_amount" => '/^((?:[1-9]\d |\d).(?:[1-9]\d |\d)(?:\,\d\d)?)$/',
]);
$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
$data = array_combine(
    [
        0 => "10,00 % Steuer von",
        1 => "1.650,31",
        2 => "165,03",
    ],
    [
        "tax" => '/^(\S \w)/',
        "net_amount" => '/^((?:[1-9]\d |\d).(?:[1-9]\d |\d)(?:\,\d\d)?)$/',
        "tax_amount" => '/^((?:[1-9]\d |\d).(?:[1-9]\d |\d)(?:\,\d\d)?)$/',
    ]
);
$result = [];
array_walk($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
)

CodePudding user response：

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
)