How PHP built-in functions are shared by instances invoked in Smarty

Clevercode found that calling PHP built-in functions in Smarty can be implemented by | | There are no spaces before and after. If it is an array, count needs to be added @.

1 parameters at a time:

{' param1 ' |functionname}}

For example

{{$tmpStr |strlen}}

2 parameters at a time:

{' param1 ' |functionname: ' Param2 '}} {$tmpStr |substr: ' 1 '}

Multiple parameter times:

{' param1 ' |functionname: ' param2 ': ' Param3 ' ...}} {{$tmpStr |substr: ' 1 ': ' 2 '}} {' A ' |str_replace: ' A ': $tmpStr}}

1 Marty to determine whether it is empty

The following code PHP is assigned to TMPSTR is empty or not assigned; then output in Smarty is 0. This is the built-in function called PHP strlen
PHP Code:

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

2 Marty to find the array length

The array length is evaluated using PHP's built-in functions Is_array and count, such as code output 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 String substitution

The following code is to replace 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