thinkphp Template Comparison Label usage detailed _php example

The thinkphp template engine provides a rich comparison label in the format of:

< comparison label name= "variable" value= "value" > Content </Comparison label >

The comparison label supported by the thinkphp system and the meanings it represents are:

EQ or equal: equal to
NEQ or notequal: Not equal to
GT: Greater Than
EGT: greater than or equal
LT: less than
ELT: less than or equal
Heq: Constant equals
Nheq: not constant equals

1. The usage of the comparison label is basically consistent, the difference being that the condition of judgment is different .

such as EQ Label:

<eq name= "name" value= "value" >value</eq>

Indicates that the value of the name variable equals value is output.

Or it can be written as:

<equal name= "name" value= "value" >value</equal>

You can also support the mixed use of the else tag , such as:

<eq name= "name" value= "value" > Equality <else/> inequality </eq>

The GT tag is used as follows:

<GT name= "Name" value= "5" >value</gt>

Represents the output when the value of the name variable is greater than 5

The EGT label is used as follows:

<egt name= "Name" value= "5" >value</egt>

Indicates that the value of the name variable is output when it is not less than 5

2. Comparisons of variables in a label can support an object's properties or an array, or even a system variable :

The EQ tag example is as follows:

<eq name= "Vo.name" value= "5" >{$vo .name}</eq>

Represents the output when a Vo object's attributes (or an array, or automatic judgment) equals 5

<eq name= "Vo:name" value= "5" >{$vo .name}</eq>

Represents the output when a Vo object's property equals 5

<eq name= "vo[' name '" "value=" 5 ">{$vo .name}</eq>

Indicates that when $vo[' name ' equals 5, the output

3. You can also support the use of functions on variables

Such as:

<eq name= "Vo:name|strlen" value= "5" >{$vo .name}</eq>

Indicates that the string length of the attribute value of the Vo object is equal to 5.

4. Variable names can support the way system variables , for example:

<eq name= "Think.get.name" value= "value" > Equality <else/> inequality </eq>

5. Usually the value of the comparison label is a string or a number, and if you need to use a variable, simply add the "$" flag to the front .

Such as:

<eq name= "Vo:name" value= "$a" >{$vo .name}</eq>

Represents the output when a Vo object's attributes are equal to $a

6. All comparison tags can be uniformly used compare tags (in fact all of the comparison tags are compare tags alias), for example:

<compare name= "Name" value= "5" type= "EQ" >value</compare>

Represents the output when the value of the name variable equals 5

is equivalent to

<eq name= "Name" value= "5" >value</eq>

The value of the Type property is the comparison label name listed above