preg_filter - PHP code example

PHP Function Preg_Filter

PHP is a server side scripting language that is widely used in web development to manage dynamic content. It has several functions that can work with various data types, including regular expression patterns. The syntax for these patterns closely resembles that of Perl, and they need to be escaped by backslash.

The php function preg_filter is one of the most useful for filtering arrays of data using regular expression patterns. It can be used to remove HTML tags, strip special characters from text, or format dates in a specific way. It is also very helpful for checking for valid data, and for converting text from one format to another.

To use php function preg_filter, you will need a regular expression pattern and an input string to search for the matches. You will also need an output string or an array to replace the matching strings with. The replacement string can be either a new regular expression or the original subject string. The php function preg_filter can take up to five parameters as mentioned below:

The first parameter is the regular expression pattern, which will be searched against the input string. The second parameter is the subject, which can be either a single string or an array of strings. The third and fourth parameters are the index where to start searching for the pattern, and the number of match found. The fifth parameter is the output, which can be a string, an array or a list of numbers.

preg_filter example

        }

        return true;
    }

    public function isIgnoredDeprecation(Deprecation $deprecation): bool
    {
        if (!$this->ignoreDeprecationPatterns) {
            return false;
        }
        $result = @preg_filter($this->ignoreDeprecationPatterns, '$0', $deprecation->getMessage());
        if (\PREG_NO_ERROR !== preg_last_error()) {
            throw new \RuntimeException(preg_last_error_msg());
        }

        return (bool) $result;
    }

    /** * @param array<string,DeprecationGroup> $deprecationGroups * * @return bool true if the threshold is not reached for the deprecation type nor for the total */

                $this->data['links'][$key] = array_unique($this->data['links'][$key]);
            }
        }

        if (isset($this->data['headers']['link']))
        {
            $link_headers = $this->data['headers']['link'];
            if (is_string($link_headers)) {
                $link_headers = array($link_headers);
            }
            $matches = preg_filter('/<([^>]+)>; rel='.preg_quote($rel).'/', '$1', $link_headers);
            if (!empty($matches)) {
                return $matches;
            }
        }

        if (isset($this->data['links'][$rel]))
        {
            return $this->data['links'][$rel];
        }

        return null;
    }