What are the php smarty template operators? How to use operators?

20 commonly used variables in smartyOperator * Usage syntax: {Variable name|Operator:｝

* capitalize ---Capitalize the first letter
* count_characters --- Calculate the number of characters
* cat --- Connect string
* count_paragraphs --- Calculate the number of paragraphs
* count_sentences ---Calculate the number of sentences
* count_words ---Calculate the number of words
* date_format ---Time format
* default ---Default
* escape --- transcoding
* indent --- indent
* lower --- lowercase
* nl2br --- replace newline characters with
* regex_replace --- regular Replace
* replace ---Replace
* spacify ---Insert blanks
* string_format ---String formatting
* strip ---Remove extra spaces
* strip_tags ---Remove html tags
* truncate ---Truncate
* upper ---Capital
* wordwrap --Constrain line width

Usage:
index.php

<?php
include("smarty_inc.php"); 
$name = "My name is MaJi,age 22,sex boy.<a href=>aaaaaa</a>."; 
$smarty->assign("title", $name); 
$smarty->assign("row", $row); 
$smarty->assign("d",strtotime("-0")); 
$smarty->assign("nubmer", 342345.736524); 
$smarty->display("index.html"); 
?>

index.html
Original data: {$title}

After using the capitalize variable operator: {$title|capitalize }
After using the count_characters variable operator: {$title|count_characters}
After using the cat variable operator: {$title|cat:"wwww.baidu.com"}
After using the count_paragraphs variable operator : {$title|count_paragraphs}
After using the count_sentences variable function operator: {$title|count_sentences}
After using the count_words variable function operator: {$title|count_words}
Original time data: {$d }
Use date_format variable function operation: {$d|date_format:"%Y-%m-%d"}
Use smarty.now calling time: {$smarty.now|date_format:"%Y-% m-%d"}
Use default variable function operation: {$title1|default:"No such variable"}
Use escape variable function operation: {$title|escape:"html"}
Use indent variable function operation: {$title|indent:2:" "}
Use lower variable function operation: {$title|lower}
Use upper variable function operation: {$title|upper}
Use replace variable function operation: {$title|replace:"is":"@@"}
Use spacify variable function operation: {$title|spacify:"_"}
Use string_format variable function operation: {$ nubmer|string_format:"%.2f"}
Use strip variable function operation: {$title|strip:"_"}
Use strip_tags variable function operation: {$title|strip_tags}
Use truncate variable Function operation: {$title|truncate:30:"..."}
Use wordwrap variable function operation: {$title|wordwrap:10:"0c6dc11e160d3b678d68754cc175188a"}

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