diff options
Diffstat (limited to 'user_guide_src/source/libraries')
| -rw-r--r-- | user_guide_src/source/libraries/parser.rst | 139 |
1 files changed, 74 insertions, 65 deletions
diff --git a/user_guide_src/source/libraries/parser.rst b/user_guide_src/source/libraries/parser.rst index 23b2492c9..7c690ac2a 100644 --- a/user_guide_src/source/libraries/parser.rst +++ b/user_guide_src/source/libraries/parser.rst @@ -2,26 +2,26 @@ Template Parser Class ##################### -The Template Parser Class can perform simple text substitution for pseudo-variables -contained within your view files. It can parse simple variables or -variable tag pairs. +The Template Parser Class can perform simple text substitution for +pseudo-variables contained within your view files. +It can parse simple variables or variable tag pairs. If you've never used a template engine, pseudo-variable names are enclosed in braces, like this:: <html> - <head> - <title>{blog_title}</title> - </head> - <body> - - <h3>{blog_heading}</h3> - - {blog_entries} - <h5>{title}</h5> - <p>{body}</p> - {/blog_entries} - </body> + <head> + <title>{blog_title}</title> + </head> + <body> + + <h3>{blog_heading}</h3> + + {blog_entries} + <h5>{title}</h5> + <p>{body}</p> + {/blog_entries} + </body> </html> These variables are not actual PHP variables, but rather plain text @@ -30,8 +30,9 @@ representations that allow you to eliminate PHP from your templates .. note:: CodeIgniter does **not** require you to use this class since using pure PHP in your view pages lets them run a little faster. - However, some developers prefer to use a template engine if they work - with designers who they feel would find some confusion working with PHP. + However, some developers prefer to use a template engine if + they work with designers who they feel would find some + confusion working with PHP. .. important:: The Template Parser Class is **not** a full-blown template parsing solution. We've kept it very lean on purpose in order @@ -60,12 +61,13 @@ $this->parser Parsing templates ***************** -You can use the ``parse()`` method to parse (or render) simple templates, like this:: +You can use the ``parse()`` method to parse (or render) simple templates, +like this:: $data = array( - 'blog_title' => 'My Blog Title', - 'blog_heading' => 'My Blog Heading' - ); + 'blog_title' => 'My Blog Title', + 'blog_heading' => 'My Blog Heading' + ); $this->parser->parse('blog_template', $data); @@ -93,18 +95,18 @@ iteration containing new values? Consider the template example we showed at the top of the page:: <html> - <head> - <title>{blog_title}</title> - </head> - <body> - - <h3>{blog_heading}</h3> - - {blog_entries} - <h5>{title}</h5> - <p>{body}</p> - {/blog_entries} - </body> + <head> + <title>{blog_title}</title> + </head> + <body> + + <h3>{blog_heading}</h3> + + {blog_entries} + <h5>{title}</h5> + <p>{body}</p> + {/blog_entries} + </body> </html> In the above code you'll notice a pair of variables: {blog_entries} @@ -119,16 +121,16 @@ corresponding to your variable pair data. Consider this example:: $this->load->library('parser'); $data = array( - 'blog_title' => 'My Blog Title', - 'blog_heading' => 'My Blog Heading', - 'blog_entries' => array( - array('title' => 'Title 1', 'body' => 'Body 1'), - array('title' => 'Title 2', 'body' => 'Body 2'), - array('title' => 'Title 3', 'body' => 'Body 3'), - array('title' => 'Title 4', 'body' => 'Body 4'), - array('title' => 'Title 5', 'body' => 'Body 5') - ) - ); + 'blog_title' => 'My Blog Title', + 'blog_heading' => 'My Blog Heading', + 'blog_entries' => array( + array('title' => 'Title 1', 'body' => 'Body 1'), + array('title' => 'Title 2', 'body' => 'Body 2'), + array('title' => 'Title 3', 'body' => 'Body 3'), + array('title' => 'Title 4', 'body' => 'Body 4'), + array('title' => 'Title 5', 'body' => 'Body 5') + ) + ); $this->parser->parse('blog_template', $data); @@ -141,10 +143,10 @@ function:: $this->load->library('parser'); $data = array( - 'blog_title' => 'My Blog Title', - 'blog_heading' => 'My Blog Heading', - 'blog_entries' => $query->result_array() - ); + 'blog_title' => 'My Blog Title', + 'blog_heading' => 'My Blog Heading', + 'blog_entries' => $query->result_array() + ); $this->parser->parse('blog_template', $data); @@ -152,7 +154,8 @@ function:: Template Parser Usage Notes *************************** -If you include substitution parameters that are not referenced in your template, they are ignored:: +If you include substitution parameters that are not referenced in your +template, they are ignored:: $template = 'Hello, {firstname} {lastname}'; $data = array( @@ -164,8 +167,8 @@ If you include substitution parameters that are not referenced in your template, Result: Hello, John Doe -If you do not include a substitution parameter that is referenced in your template, the original -pseudo-variable is shown in the result:: +If you do not include a substitution parameter that is referenced in your +template, the original pseudo-variable is shown in the result:: $template = 'Hello, {firstname} {initials} {lastname}'; $data = array( @@ -177,9 +180,9 @@ pseudo-variable is shown in the result:: Result: Hello, John {initials} Doe -If you provide a string substitution parameter when an array is expected, i.e. for a variable pair, -the substitution is done for the opening variable pair tag, but the closing variable pair -tag is not rendered properly:: +If you provide a string substitution parameter when an array is expected, +i.e. for a variable pair, the substitution is done for the opening variable +pair tag, but the closing variable pair tag is not rendered properly:: $template = 'Hello, {firstname} {lastname} ({degrees}{degree} {/degrees})'; $data = array( @@ -196,7 +199,8 @@ tag is not rendered properly:: Result: Hello, John Doe (Mr{degree} {/degrees}) -If you name one of your individual substitution parameters the same as one used inside a variable pair, the results +If you name one of your individual substitution parameters the same as one +used inside a variable pair, the results may not be as expected:: $template = 'Hello, {firstname} {lastname} ({degrees}{degree} {/degrees})'; @@ -218,13 +222,16 @@ may not be as expected:: View Fragments ************** -You do not have to use variable pairs to get the effect of iteration in your views. -It is possible to use a view fragment for what would be inside a variable pair, and to -control the iteration in your controller instead of in the view. +You do not have to use variable pairs to get the effect of iteration in +your views. It is possible to use a view fragment for what would be inside +a variable pair, and to control the iteration in your controller instead +of in the view. An example with the iteration controlled in the view:: - $template = '<ul>{menuitems}<li><a href="{link}">{title}</a></li>{/menuitems}</ul>'; + $template = '<ul>{menuitems} + <li><a href="{link}">{title}</a></li> + {/menuitems}</ul>'; $data = array( 'menuitems' => array( array('title' => 'First Link', 'link' => '/first'), @@ -237,21 +244,22 @@ An example with the iteration controlled in the view:: - First Link - Second Link -An example with the iteration controlled in the controller, using a view fragment:: +An example with the iteration controlled in the controller, +using a view fragment:: - $temp_result = ''; + $temp = ''; $template1 = '<li><a href="{link}">{title}</a></li>'; $data1 = array( array('title' => 'First Link', 'link' => '/first'), array('title' => 'Second Link', 'link' => '/second'), ); foreach ($data1 as $menuitem) { - $temp_result .= $this->parser->parse_string($template1, $menuitem, TRUE); + $temp .= $this->parser->parse_string($template1, $menuitem, TRUE); } $template = '<ul>{menuitems}</ul>'; $data = array( - 'menuitems' => $temp_result + 'menuitems' => $temp ); $this->parser->parse_string($template, $data); @@ -283,8 +291,8 @@ Class Reference :returns: Parsed template string :rtype: string - This method works exactly like ``parse()``, only it accepts the template as a - string instead of loading a view file. + This method works exactly like ``parse()``, only it accepts + the template as a string instead of loading a view file. .. method:: set_delimiters([$l = '{'[, $r = '}']]) @@ -292,4 +300,5 @@ Class Reference :param string $r: Right delimiter :rtype: void - Sets the delimiters (opening and closing) for a pseudo-variable "tag" in a template.
\ No newline at end of file + Sets the delimiters (opening and closing) for a + pseudo-variable "tag" in a template.
\ No newline at end of file |