How does DreamWeaver CMS realize judgment output?-DEDECMS-php.cn

How does DreamWeaver CMS realize judgment output?

藏色散人

Release： 2019-12-02 09:48:50

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How does DreamWeaver CMS achieve judgment output?

Detailed explanation of several commonly used field judgment output examples of Dreamweaver CMS

When we use Dreamweaver CMS to create a website, for a certain field, whether it is a default field or a custom field , and occasionally use some judgment statements to achieve our needs. Several common requirements are listed below. And the judgment output example of the field.

Recommended learning: DreamWeaver cms

The first type: DreamWeaver custom field, if there is no value, the specified default content should be displayed,

{dede:field name=&#39;ziduan&#39; runphp=&#39;yes&#39;}
 if(@me==&#39;&#39;) { @me = &#39;&#39; ;}
 else { @me = "<div class=&#39;red&#39;><a href=&#39;/.@me&#39;>此处是自定义的内容</a></div>"; } 
{/dede:field}

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Second type: DedeCMS will display the complete title when it determines that the abbreviated title is empty

Method 1, applicable to content pages

{dede:field name=&#39;array&#39; runphp=&#39;yes&#39;}
 if (@me[&#39;shorttitle&#39;]==&#39;&#39;) 
@me=@me[&#39;title&#39;]; 
  
else
 @me=@me[&#39;shorttitle&#39;];
 {/dede:field}

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Method 2, applicable to list pages

[field:array runphp=&#39;yes&#39;]
 if (@me[&#39;shorttitle&#39;]==&#39;&#39;) @me=@me[&#39;title&#39;]; 
else @me=@me[&#39;shorttitle&#39;]; 
[/field:array]

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The third type: multiple judgments on a certain field

[field:array runphp=&#39;yes&#39;]
 if(@me[&#39;risklevel&#39;]=="HR")@me="HR.png"; 
else if(@me[&#39;risklevel&#39;]=="D")@me="D.png"; 
else if(@me[&#39;risklevel&#39;]=="AA")@me="AA.png";
 [/field:array]

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The above means that if the value of the risk level field obtained by the query is HR, then HR.png will be output. If the value of the risk level field obtained by the query is The value of is D, then D.png will be output. If the value of the risk level field obtained by the query is AA, then AA.png will be output. HR.png here is just a string, representing the location of the image file. , you can set it to any image path. The above code is a branch conditional output statement. @me represents the output variable. When you first enter the label field:array, @me represents a record in the database, and its data type is an array. , we judge based on the value of risklevle, thereby setting @me to different values. When exiting the label field:array, the value of @me will be displayed in the original position.

The fourth type: other fields need to be called during the judgment process.

You need to make a small judgment in the template. If the price of the article is 0, the download address will be directly output. Otherwise, the purchase link will be output directly. Then you must run the runphp='yes' function at this time. Let's take a look at the code:

After searching, we found that two methods can basically be implemented

1. First, put the values that need to call other fields in public variables, and then directly call the public For the value of the variable, see the code

{dede:php}$GLOBALS[&#39;title&#39;]=$arc->Fields[&#39;title&#39;]{/dede:php} 
{dede:php}$GLOBALS[&#39;baidupan&#39;]=$arc->Fields[&#39;baidupan&#39;]{/dede:php} 
{dede:field.price runphp="yes"}
if(@me="0")
@me = "下载地址：".$GLOBALS[&#39;baidupan&#39;];
else
@me = "商品（".$GLOBALS[&#39;title&#39;]."）购买链接为：XXX";
{/dede:field.xxxx}

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2. Directly use name='array' to assign the values of other fields to the array, and then use it. See the code

{dede:field name=&#39;array&#39; runphp=&#39;yes&#39;}
if(@me[&#39;price&#39;]==&#39;0&#39; )
@me = &#39;
<li><a class="demo" href="&#39;.@me[&#39;baidupan&#39;].&#39;" target="_blank">下载：&#39;.@me[&#39;baidupwd&#39;].&#39;</a></li>
&#39;;
else
@me = &#39;
<div id="pdBuy" class="PDB2C_moban_warp" dataP="&#39;.@me[&#39;title&#39;].&#39;" dataR="&#39;.@me[&#39;price&#39;].&#39;"><img src="/uploads/allimg/170702/155R26021-0.gif"></div>
&#39;;
{/dede:field}

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. Many of the above points require attention to symbols. , single quotes, double quotes.

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