Example sharing of how to call PHP built-in functions in smarty

CleverCode found that calling phpbuilt-in functions in smarty can be achieved through |. |No spaces before and after. If it is an array, you need to add @ to find the count.

When there are 1 parameters:

{{'param1'|functionName}}

For example,

{{$tmpStr|
strlen
}}

When there are 2 parameters:

{{'param1'|functionName:'param2'}}
{$tmpStr|substr:'1'}

When there are multiple parameters:

{{'param1'|functionName:'param2':'param3'..}} 
{{$tmpStr|substr:'1':'2'}}
{{'a'|str_replace:'A':$tmpStr}}

1 marty determines whether it is empty

The following code The tmpStr allocated by php is empty or not allocated; then smarty outputs 0. This is calling PHP's built-in function strlen
php code:

$smarty->assign('tmpStr','');
smarty代码：
{{if $tmpStr|strlen > 0 }}
    1
{{else}}
    0
{{/if}}

2 marty seeks the length of the array

Get the array length through PHP's built-in functions is_array and count. The following code outputs 5
php code:

$smarty->assign('tmpArr',array(1,2,3,4,5));

smarty code:

{{if $tmpArr|is_array && $tmpArr|@count > 0}}    
{{$tmpArr|@count}}{{else}}    
0
{{/if}}

3 marty StringReplacement

The following code replaces b in tmpStr with c

$smarty->assign('tmpStr','abb');
{{'b'|str_replace:'c':$tmpStr}}

Output:

acc

4 marty intercept field

$smarty->assign('tmpStr','abb');
{{$tmpStr|substr:'1'}}

Output:

bb

{{$tmpStr|substr:'1':'1'}}

Output:

b

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