PHP array foreach Traversal output example detailed

Last Update:2017-01-13 Source: Internet

Author: User

Tags php foreach php template

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A simple php array function, before this need has not been known to have such a function, wipe the sweat ...

PHP Array Reverse output code

The code is as follows	Copy Code
foreach (Array_reverse ($array) as $key => $value) { echo $value. ' '; }

Array_reverse
(PHP 4, PHP 5)
array_reverse-returns an array of cells in reverse order

Description

Array array_reverse (array $array [, BOOL $preserve _keys])
Array_reverse () takes an array of arrays as input and returns a new array of cells in reverse order, and retains the original key name if Preserve_keys is TRUE.

Example #1 Array_reverse () example

code is as follows	copy code
<?php $input = Array ("PHP", 4.0, Array ("Green", "red")); $result = Array_reverse ($input); $result _keyed = Array_reverse ($input, TRUE); ?

This will allow the $result and $result _keyed to have the same unit, but note the difference between the key names. The printout of the $result and $result _keyed is:
Array
(
[0] => Array
(
[0] => Green
[1] => Red
)

[1] => 4
[2] => PHP
)
Array
(
[2] => Array
(
[0] => Green
[1] => Red
)

[1] => 4
[0] => PHP
)

example, in the PHP template engine

Template file:

The code is as follows

Copy Code

foreach test:

{foreach (From=url key=b item=c)}
<a href= "Index.php?artcle_id={==b}" >{==c}</a>
{/foreach}

</body>

Parsing Engine:

The code is as follows

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Var
$pattern _var = "/{$left _tag}\\$ ([\w\d]+) {$right _tag}/";
$replace _var = ' <?php echo\ $this->var_tpl_arr[' $];? > ';

if (Preg_match ($pattern _var, $content)) {
$content = Preg_replace ($pattern _var, $replace _var, $content);
}

Foreach
Preg_match_all ("/{$left _tag}foreach\s+" ([^{]+?) {$right _tag}/is ", $content, $match _foreach);
if (Isset ($match _foreach[1]) && Is_array ($match _foreach)) {
foreach ($match _foreach[1] as $match _key => $match _value) {
$split _foreachs = Array_filter (Preg_split ('/\s+/is ', $match _value));
$new _foreach_tag = Array ();
foreach ($split _foreachs as $split _foreach) {
$split = explode ("=", $split _foreach);
if (count ($split = = 2)) {
if (In_array ($split [0], array ("from", "Item", "key")) {
Filter label does not exist filter
$new _foreach_tag[$split [0]] = $split [1];
}
}
}

$from = $key = $item = ';
Extract ($new _foreach_tag);
$key = ($key)? ' $ '. $key. ' => ': ';
$replace _foreach = ' <?php foreach ($this->var_tpl_arr['. $from. '] as '. $key. ' $ '. $item. ') {?> ';
$content = Str_replace ($match _foreach[0][$match _key], $replace _foreach, $content);

}
}

$pattern _foreach = "/{$left _tag}\/foreach{$right _tag}/";
$replace _foreach = "<?php}?>";
if (Preg_match ($pattern _foreach, $content)) {
$content = Preg_replace ($pattern _foreach, $replace _foreach, $content);
}

VAR in statement
$pattern _var = "/{$left _tag}== ([\w\d]+) {$right _tag}/";
$replace _var = ' <?php echo\$$1;? > ';

if (Preg_match ($pattern _var, $content)) {
$content = Preg_replace ($pattern _var, $replace _var, $content);
}

After parsing:

The code is as follows

Copy Code

<! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "HTTP://WWW.W3.ORG/TR/HTML4/LOOSE.DTD" >
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 ">
<title><?php echo $this->var_tpl_arr["Web_tile"];? ></title>
<body>
<?php echo $this->var_tpl_arr["Article_title"];? >
 
-by <?php Echo $this->var_tpl_arr["author"];? >
 
<?php echo $this->var_tpl_arr["content"];? >
 
--Publish @ <?php echo $this->var_tpl_arr["Time"];? >

foreach test:

<?php foreach ($this->var_tpl_arr["url"] as $b => $c) {?>
<a href= "index.php?artcle_id=<?php echo $b;? > "><?php echo $c;? ></a>
<?php}?>

</body>

Use:

The code is as follows

Copy Code

<?php

require_once ' core/yatp.class.php ';

$app = new YATP ();
Date_default_timezone_set ("Asia/shanghai");
$app->is_cache = false;

$article _title = "Yet,it is a simple template engine";
$author = "sanwhiteyu@tencent.com";
$web _tile = "just test";
$content = "It is easy to write a simple template engine for Yourself,what u can does is try to do it!";
$time = Date ("Y-m-d h:i:s", Time ());

$url = Array (
"URL1" => "Http://www.111cn.net",
url2 "=>" http:// Www.111cn.net ",
);

$app->assign ("Article_title", $article _title);
$app->assign ("author", $author);
$app->assign ("Web_tile", $web _tile);
$app->assign ("content", $content);
$app->assign ("Time", $time);
$app->assign ("url", $url);
$app->display ("index.html");

//end of script

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