CODEWITHSUNDEEP
phpregex
yossi
yossi

Reputation: 1431

How to replace dynamic string?

I have variable $menu type array like below:

$menu = array('<li class="page_item page-item-155">',
              '<li class="page_item page-item-49">',
              '<li class="page_item page-item-72">',
              '<li class="page_item page-item-18">',
              '<li class="page_item page-item-50">');

I want to replace the first original string 

<li class="page_item page-item-155">'

to

<li class="current">

In the end of the string it can be any number, the numbers are not constant.

I think I need to use a regular expression but I don't know how to implement it.

$menu = str_replace($original_strs_array, $replacement_strs_array, $menu);

How can I do that? Thanks.

Upvotes: 0

Views: 2632

Answers (2)

Ariyan
Ariyan

Reputation: 15158

try this : 

preg_replace('/page_item page-item-\d+/','current',$menu);

Or this for a generic class remover/replacer: 

preg_replace("/class\s*=\s*('|\")[^'\"]*('|\")/",'class="current"',$menu);

Upvotes: 1

Glavić
Glavić

Reputation: 43552

Code

All $menu values: replace class="*" with class="current"

$menuA = preg_replace('~class=".+"~', 'class="current"', $menu);
print_r($menuA);

All $menu values: add className "current" to the current class

$menuB = preg_replace('~class="(.+?)"~', 'class="$1 current"', $menu);
print_r($menuB);

Selected menu: replace class="*" with class="current"

$menuC = preg_replace('~class=".*?page-item-'.$selectedMenuId.'"~', 'class="current"', $menu);
print_r($menuC);

Selected menu: add className "current" to the current class

$menuD = preg_replace('~class="(.*?)page-item-('.$selectedMenuId.')"~', 'class="$1page-item-$2 current"', $menu);
print_r($menuD);

Output

$menuA = Array
(
    [0] => <li class="current">
    [1] => <li class="current">
    [2] => <li class="current">
    [3] => <li class="current">
    [4] => <li class="current">
)
$menuB = Array
(
    [0] => <li class="page_item page-item-155 current">
    [1] => <li class="page_item page-item-49 current">
    [2] => <li class="page_item page-item-72 current">
    [3] => <li class="page_item page-item-18 current">
    [4] => <li class="page_item page-item-50 current">
)
$menuC = Array
(
    [0] => <li class="page_item page-item-155">
    [1] => <li class="page_item page-item-49">
    [2] => <li class="current">
    [3] => <li class="page_item page-item-18">
    [4] => <li class="page_item page-item-50">
)
$menuD = Array
(
    [0] => <li class="page_item page-item-155">
    [1] => <li class="page_item page-item-49">
    [2] => <li class="page_item page-item-72 current">
    [3] => <li class="page_item page-item-18">
    [4] => <li class="page_item page-item-50">
)

Upvotes: 3

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