This article mainly introduces the usage of the built-in functions section and sectionelse of the PHP template engine Smarty. It analyzes in detail the techniques and usage of section and sectionelse for loop processing in the form of examples. Friends in need can refer to it
section is another solution for processing loops in Smarty templates besides foreach. Section is more flexible than foreach. It is like an improved foreach statement. In addition to having the same loop characteristics, it also provides many additional options that can be modified. Good control loop execution. In the template, you must use paired section tags. There are two attributes that must be set, name and loop. For the attributes of section, please see the following table:
Attributes | Type | Is it required | Default value | Description |
---|---|---|---|---|
name | string | Yes | ##n/a | The name of the loop|
[$variable_name] | Yes | ##n/aDecided to loop Variable name of times | ||
integer | No | 0 The initial position of loop execution. If the value is a negative number, the starting position is calculated from the end of the array. For example: if there are 7 elements in the array and specify start as -2, then the index pointing to the current array is 5. Illegal values (exceeding the lower limit of the loop array) will be automatically adjusted to the closest legal value. | ||
integer | No | 1This value determines the step size of the loop. For example, specifying step=2 will only traverse the subscripts 0, 2, 4, etc. elements. If step is a negative value, then traverse the array from back to front. | ||
integer | No | 1Set the maximum number of executions of the loop. | ||
boolean | No | trueDetermine whether to display the loop. |
Variable name |
Description |
index | Used to display the index of the current loop, starting from 0 (if the start attribute is set, then it starts from this value), and increases by 1 each time (if the step attribute is specified, then it is determined by this value) |
index_prev | is used to display the previous loop index value. When the loop starts, this value is -1 |
index_next | Used to display the next loop index value. When the loop is executed for the last time, this value is still 1 greater than the current index value (if the step attribute is specified, it is determined by this value) |
iteration | Used to display the number of loops |
first | The value of this variable when the current section loop is executed for the first time is true |
last | The value of this variable is true when the current section loop is executed for the last time |
rownum | Used to display the number of loops. This attribute is an alias of iteration. They are the same. |
loop | Used to display the number of times the loop last cycled. Index value, this value can be used inside the loop or after the loop ends. |
show | is the parameter of section. The value of show is boolean true and false. If set If false, the loop will not be displayed. If the sectionelse clause is specified, whether the clause is displayed also depends on the value |
total | is used to display the number of loop executions. This attribute can be called not only in the loop, but also after the execution is completed |
Summary: The above is the entire content of this article, I hope it will be helpful to everyone's learning .
Related recommendations:
phpUsing the method of counting visits with text, detailed explanation with pictures and text
in PHP Detailed explanation of comparison operations and logical operation examples
phpThe definition and usage examples of similar_text() function in php
The above is the detailed content of PHP template engine Smarty built-in function section, sectionelse usage and examples detailed explanation. For more information, please follow other related articles on the PHP Chinese website!