更改值標記PHP

Question

我想用php更改變量值的標記值;

$tag = '<string name="abs__action_bar_home_description">My old title</string>'; 
$new_title = 'My new title'; 

結果：

<string name="abs__action_bar_home_description">**My new title**</string> 

Answer 1

您可以使用PHP函數的preg_replace。例如你here

<?php 

$tag = '<string name="abs__action_bar_home_description">My old title</string>'; 
$new_title = 'My new title'; 

$pattern = "/(<string[\s\w=\"]*>)([\w\s]*)(<\/string>)/i"; 
$replacement = "$1".$new_title."$3"; 
$result = preg_replace($pattern, $replacement ,$tag); 

echo $result; 

?> 

Answer 2

這裏是你如何能做到無正則表達式相同，但與DOMDocument和DOMXPath：

$tag = '<string name="abs__action_bar_home_description">My old title</string>'; 
$new_title = 'My new title'; 
$dom = new DOMDocument('1.0', 'UTF-8'); 
@$dom->loadHTML($tag, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD); 

$xpath = new DOMXPath($dom); 
$links = $xpath->query('//string[@name="abs__action_bar_home_description"]'); 

foreach($links as $link) { 
    $link->nodeValue = $new_title; 
} 

echo $dom->saveHTML(); 

見IDEONE demo

的'//string[@name="abs__action_bar_home_description"]'的XPath意味着你要獲得string標記，該標記的屬性name的值爲abs__action_bar_home_description。

如果加載HTML文件，你可以使用像

$dom->loadHTMLFile("http://www.example.com/content.html");