Regular Expression Pattern Search

Question

There is an array of strings:

$test = array( 'Required route parameter not passed: :param', 'The :property property does not exist in the :class class', 'The requested view :file.:ext could not be found', 'PHP internal call', 'API method :uri: :code');

It is necessary to find and zamenit constructions of the form ': label' on ':'. Str_rot13 ('label'), there may be several constructions in a line, there is no nesting. The label starts with a colon, and ends with a space, a period, a comma, a colon.

The problem is that I do not know how to make a "regular schedule" for isolating these labels. I will also be grateful for intelligible materials on them, preferably with a large number of examples.

The final option:

 $test = preg_replace_callback('~:(\w+)~', function($matches){return ':'.str_rot13($matches[1]);}, $test);

Accepted Answer · 2013-09-02T07:28:11

You can do this using preg_replace_callback()

 <?php $test = array( 'Required route parameter not passed: :param', 'The :property property does not exist in the :class class', 'The requested view :file.:ext could not be found', 'PHP internal call', 'API method :uri: :code'); function str13_run($matches) { return ":".str_rot13($matches[1]); // первая группа } $test=preg_replace_callback('/:(\w+)/s','str13_run',$test); print_r($test);

Demo

list of functions for working with regulars
pcre regular syntax
examples of regulars (english, there is about perl, but perl regulars are used in php, so read more perlre

in the sense of: not at the beginning, I probably forgot it, or somewhere along the way I decided that it was not necessary.
symbol is devoured: in front of the label and for beauty, replace closure with f-tion
Well, the symbol returned, and as for the beauty of closure, in the midst of the perl function, I would argue, it’s not js, it’s not pretty here.

Answer 2 · 2013-09-02T07:23:04

 // Исходный массив $test = array( 'Required route parameter not passed: :param', 'The :property property does not exist in the :class class', 'The requested view :file.:ext could not be found', 'PHP internal call', 'API method :uri: :code'); // Результирующий массив $result = array(); // Проходим по всем элементам массива foreach($test as $i) { // Находим все нужные нам элементы и складываем их в массив $out preg_match_all('/\:([^ \.\:]+)/i', $i, $out); // Обновляем блоки замен по требуемой маске. Теперь в массиве $out // два подмассива: $out[0] - элементы, которые надо заменить // $out[1] - соответствующие им элементы-заместители foreach($out[1] as &$ii) { $ii = ':' . str_rot13($ii); } // Добавляем в результирующий массив результаты замены $out[0] на $out[1] $result[] = str_replace($out[0], $out[1], $i); }

The best of regular expressions: J. Friedl’s book Regular Expressions . Mastkhev.

thanks, the only thing that was necessary was to call the str_rot13 function, so the eicto option is more kosher)

Regular Expression Pattern Search

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