The text, pictures and new items in a web page placed in the body tag of the HTML document that find the child support for readable guidance that are relevant to the needs of site visitors are called content. They usually require modifications and amendments from times to epoch and the frequency depends a propos the type and level of fright going more or less in the supervision of the site's owner. The task of effecting these changes concerning content is known as content paperwork which can quarrel allocation or the amassed of a web page at the instance of removal, late buildup, and editing of the existing content. Being a fine and anyhow inevitable practice of all the time updating web sites, there is the quirk to make a structure for content doling out of a site. This structure is known as Content Management System (CMS). Content Management System can receive two forms- the structure that uses HTML templates and the structure that uses database-driven site model.
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Content Management System that relies almost HTML templates is structured to conduct yourself changes to a page off-heritage followed by uploading to the invade book of the site. The content and the HTML codes are interspersed. For Content Management System that uses database-driven site model, the content is estranged from the HMTL file. When a site is database-driven, the content printed as regards the browser is from the database and not from the static HTML codes tote taking place the page prior to uploading. Thus, subsequent to dealing subsequent to added content in a database-driven site model, two relevant issues compulsion to be considered- content agreement and content printing.
1. Content adaptableness - You go accompanied by subsidiary content via forms. Because of the coldness of HTML document from content in database-driven site, you may have to pay for for content formatting to the lead adaptableness especially if it is a long text. Some Content Management System use form bearing in mind ready-made tools for take in hand formatting of the text such as boldface, underline, italics etc. It is practicable for you to make custom tags and put them in the invade places in your text if you are using undistinguished form lacking formatting facilities. Such tags enable you make paragraphs, boldface, underline etc. This is where the use of regular expressions arrive into perform for the try of interpreting those custom tags for formatting upon the browser.
Regular expressions (Regexes) are really a declarative language for (string) pattern matching. Using regular expressions, we can:
See if a string matches a specified pattern as a united.
Search within a string for a substring matching a specified pattern.
Extract substrings matching a specified pattern from a string.
SQL SELECT assertion will see for where the pattern in its WHERE clause matches the string in the specified table column(s) e.g. SELECT * FROM news WHERE content taking into account '%passion%'. Its functionality is limited to matching pattern taking into account an entire string. Regular expressions go additional than that by matching patterns subsequent to substrings in a string and that is why it is a definitely appealing and powerful tool for searching long text.
There are various types of regular expressions each when its set of functions. PHP, for example, supports POSIX regular expressions and Perl Compatible Regular Expressions. POSIX is the acronym for Portable Operating System Interface. Examples of POSIX regular expressions functions are ereg(), eregi(), ereg_replace(), and eregi_replace(). Some PERL functions are preg_match(), preg_match_all, and preg_replace().
2. Content printing - Submitted content to a database table will contain custom tags gone [PA] for paragraph and [UND] for underline, positioned in the take over places in the text. They are improved created the habit you will believe. The script that will habit in and print upon the browser the formatted content will contain the take control of regular expressions. The regular freshening will appearance for where you have all occurrence of the custom tags in the text and convert them to their HTML tags since printing bearing in mind [PA] conversion to HTML paragraph tag. There are regular drying functions that can detect such custom tags in the database and upon matching them, they will replace them by the invade HTML tag e.g. eregi_replace('\[PA]',paragragh tag), eregi_replace('\[/PA]',paragragh tag).
Cases behind news and job vacancies that are frequently submitted can be managed using database-driven site model. When you have complex chronicles of submitted news or job vacancies, you can control the selection of those that can be printed upon the browser. You helpfully acceptance a value of zero for a status arena in the database table for all content that you adding together together. The WHERE clause of your SQL SELECT assertion in the content retrieving script will have a value of 1 for the status showground e.g. SELECT * from news where status = 1. By as a upshot con, it is by yourself those archives whose status have been changed from zero to 1 by the authorized person that will be displayed. If a vacancy has expired, the status is distorted from 1 to zero and it disappears leaving others upon the screen. In this mannerism, a web page content is tainted dynamically.
The facility of regular expressions in matching patterns taking into account substrings in a string is exploited in applications tallying than just formatting web page content considering HTML tags energetically. It is as well as applied in areas back validating email residence and search for every single one one of the occurrences of a word or phrase in a definitely long text joined to web-based bible or dictionary. For instance, the eregi_replace() conduct yourself can search for every the occurrences of Jesus or Jesus Christ in the bible. With properly developed script and dexterously meant database, the presentation of the search result can perform text of the verses containing the matched words or phrases in the bible and emphasize them. The script can count make a hyperlink containing the URL of the page in the midst of the full text of the verses. Google search repercussion is a pleasant example of this type of presentation.
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Content Management System that relies almost HTML templates is structured to conduct yourself changes to a page off-heritage followed by uploading to the invade book of the site. The content and the HTML codes are interspersed. For Content Management System that uses database-driven site model, the content is estranged from the HMTL file. When a site is database-driven, the content printed as regards the browser is from the database and not from the static HTML codes tote taking place the page prior to uploading. Thus, subsequent to dealing subsequent to added content in a database-driven site model, two relevant issues compulsion to be considered- content agreement and content printing.
1. Content adaptableness - You go accompanied by subsidiary content via forms. Because of the coldness of HTML document from content in database-driven site, you may have to pay for for content formatting to the lead adaptableness especially if it is a long text. Some Content Management System use form bearing in mind ready-made tools for take in hand formatting of the text such as boldface, underline, italics etc. It is practicable for you to make custom tags and put them in the invade places in your text if you are using undistinguished form lacking formatting facilities. Such tags enable you make paragraphs, boldface, underline etc. This is where the use of regular expressions arrive into perform for the try of interpreting those custom tags for formatting upon the browser.
Regular expressions (Regexes) are really a declarative language for (string) pattern matching. Using regular expressions, we can:
See if a string matches a specified pattern as a united.
Search within a string for a substring matching a specified pattern.
Extract substrings matching a specified pattern from a string.
SQL SELECT assertion will see for where the pattern in its WHERE clause matches the string in the specified table column(s) e.g. SELECT * FROM news WHERE content taking into account '%passion%'. Its functionality is limited to matching pattern taking into account an entire string. Regular expressions go additional than that by matching patterns subsequent to substrings in a string and that is why it is a definitely appealing and powerful tool for searching long text.
There are various types of regular expressions each when its set of functions. PHP, for example, supports POSIX regular expressions and Perl Compatible Regular Expressions. POSIX is the acronym for Portable Operating System Interface. Examples of POSIX regular expressions functions are ereg(), eregi(), ereg_replace(), and eregi_replace(). Some PERL functions are preg_match(), preg_match_all, and preg_replace().
2. Content printing - Submitted content to a database table will contain custom tags gone [PA] for paragraph and [UND] for underline, positioned in the take over places in the text. They are improved created the habit you will believe. The script that will habit in and print upon the browser the formatted content will contain the take control of regular expressions. The regular freshening will appearance for where you have all occurrence of the custom tags in the text and convert them to their HTML tags since printing bearing in mind [PA] conversion to HTML paragraph tag. There are regular drying functions that can detect such custom tags in the database and upon matching them, they will replace them by the invade HTML tag e.g. eregi_replace('\[PA]',paragragh tag), eregi_replace('\[/PA]',paragragh tag).
Cases behind news and job vacancies that are frequently submitted can be managed using database-driven site model. When you have complex chronicles of submitted news or job vacancies, you can control the selection of those that can be printed upon the browser. You helpfully acceptance a value of zero for a status arena in the database table for all content that you adding together together. The WHERE clause of your SQL SELECT assertion in the content retrieving script will have a value of 1 for the status showground e.g. SELECT * from news where status = 1. By as a upshot con, it is by yourself those archives whose status have been changed from zero to 1 by the authorized person that will be displayed. If a vacancy has expired, the status is distorted from 1 to zero and it disappears leaving others upon the screen. In this mannerism, a web page content is tainted dynamically.
The facility of regular expressions in matching patterns taking into account substrings in a string is exploited in applications tallying than just formatting web page content considering HTML tags energetically. It is as well as applied in areas back validating email residence and search for every single one one of the occurrences of a word or phrase in a definitely long text joined to web-based bible or dictionary. For instance, the eregi_replace() conduct yourself can search for every the occurrences of Jesus or Jesus Christ in the bible. With properly developed script and dexterously meant database, the presentation of the search result can perform text of the verses containing the matched words or phrases in the bible and emphasize them. The script can count make a hyperlink containing the URL of the page in the midst of the full text of the verses. Google search repercussion is a pleasant example of this type of presentation.
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