PHP正则表达式精确url匹配,更改img src
我有一个HTML文档,标签中有一些图像。我想用数组中定义的不同值更改每个img源(src) 当我运行以下代码时,我得到 Warning: preg_replace(): Unknown modifier '/' in /var/www/test.php on line 9 Warning: preg_replace(): Unknown modifier '/' in /var/www/test.php on line 9 警告:preg_replace():第9行/var/www/test.php中的未知修饰符“/” 警告:preg_replace():第9行/var/www/test.php中的未知修饰符“/” 如何正确转义url字符串PHP正则表达式精确url匹配,更改img src,php,regex,url,replace,match,Php,Regex,Url,Replace,Match,我有一个HTML文档,标签中有一些图像。我想用数组中定义的不同值更改每个img源(src) 当我运行以下代码时,我得到 Warning: preg_replace(): Unknown modifier '/' in /var/www/test.php on line 9 Warning: preg_replace(): Unknown modifier '/' in /var/www/test.php on line 9 警告:preg_replace():第9行/var/www/test.p
<?php
$body = "<img src=http://www.google.com/img1.jpg><br>"
+ "<img width=300 src=http://www.bbc.co.uk/img1.jpg>";
$changes = array();
$changes[] = array('from' => 'http://www.google.com/img1.jpg',
'to' => 'http://cnn.com/image2.jpg');
$changes[] = array('from' => 'http://www.bbc.co.uk/img1.jpg',
'to' => 'http://www.foo.bar.com/image2.jpg');
foreach ($changes as $change){
$body = preg_replace('/<(img.*src)="'.$change['from'].'".*\/?>/',
'<\1="'.$change['to'].'">', $body)
. PHP_EOL;
}
?>
试试这个:
用于编码URL
但是,看起来您只是试图替换$body中字符串的一部分,所以我使用
而不是正则表达式
<?php
$body = "<img src=http://www.google.com/img1.jpg><br><img width=300 src=http://www.bbc.co.uk/img1.jpg>";
$changes = array();
$changes[] = array('from' => 'http://www.google.com/img1.jpg', 'to'=> 'http://cnn.com/image2.jpg');
$changes[] = array('from' => 'http://www.bbc.co.uk/img1.jpg', 'to' => 'http://www.foo.bar.com/image2.jpg');
foreach ($changes as $change){
$body = str_replace($change['from'],$change['to'],$body);
}
?>
试试这个:
用于编码URL
但是,看起来您只是试图替换$body中字符串的一部分,所以我使用
而不是正则表达式
<?php
$body = "<img src=http://www.google.com/img1.jpg><br><img width=300 src=http://www.bbc.co.uk/img1.jpg>";
$changes = array();
$changes[] = array('from' => 'http://www.google.com/img1.jpg', 'to'=> 'http://cnn.com/image2.jpg');
$changes[] = array('from' => 'http://www.bbc.co.uk/img1.jpg', 'to' => 'http://www.foo.bar.com/image2.jpg');
foreach ($changes as $change){
$body = str_replace($change['from'],$change['to'],$body);
}
?>
在/之前添加\以确保其作为字符而不是控制字符。在“发件人”文本中有正斜杠(/
),它们需要转义。在/之前添加\以确保其作为字符而不是控制字符。有正斜杠(/
)在“from”文本中-它们需要转义。