How to delete specified html tags in php

php method to delete specified html tags: 1. Use strip_tags() function, syntax "strip_tags(string,allow)"; 2. Use strip_html_tags() function, syntax "strip_html_tags(tags,str)".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php delete the specified html Tag method

$str='e388a4556c0f65e1904146cc1a846beee388a4556c0f65e1904146cc1a846bee这里是p标签94b3e26ee717c64999d7867364b1b4a315f9448f161df2127944e707d9cd02376170e8999ab19ec641e0422470b16d5c这里是a标签5db79b134e9f6b82c0b36e0489ee08ed0c6dc11e160d3b678d68754cc175188a94b3e26ee717c64999d7867364b1b4a3';

1: Delete all or keep the specified html tags

The function strip_tags that comes with php can meet the requirements,

Usage:

strip_tags(string,allow)

• string: the string that needs to be processed;

• allow: the specified tag that needs to be retained, you can write Multiple;

echo strip_tags($str,'e388a4556c0f65e1904146cc1a846bee3499910bf9dac5ae3c52d5ede7383485');//输出：e388a4556c0f65e1904146cc1a846bee这里是p标签94b3e26ee717c64999d7867364b1b4a36170e8999ab19ec641e0422470b16d5c这里是a标签5db79b134e9f6b82c0b36e0489ee08ed

The advantage of this function is that it is simple and crude;

But the shortcomings are also obvious;

If there are a lot of tags;

And I just want to delete the specified one;

That requires writing a lot of tags that need to be retained;

So there is a second method;

2: Delete the specified html tag

Usage:

strip_html_tags($tags,$str)；

• $tags: Tags that need to be deleted (array format)

• $str: the string that needs to be processed;

function strip_html_tags($tags,$str){
    $html=array();
    foreach ($tags as $tag) {
        $html[]="/(c8a6421ee9cab4b2a89ed0b67e4174e1]*>)/i";
    }
    $data=preg_replace($html, '', $str);
    return $data;
}
echo strip_html_tags(array('p','img'),$str);
//输出：dc6dce4a544fdca2df29d5ac0ea9906b这里是p标签6170e8999ab19ec641e0422470b16d5c这里是a标签5db79b134e9f6b82c0b36e0489ee08ed0c6dc11e160d3b678d68754cc175188a16b28748ea4df4d9c2150843fecfba68;

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