Home > Article > Backend Development > How to implement search and replace in php regular
How to implement search and replace in php regular
- 藏色散人Original
- 2020-10-15 10:08:472845browse
In PHP, you can use the regular expression "preg_replace ($pattern, $replacement, $subject, $limit, $count)" to achieve search and replacement.
Recommended: "PHP Video Tutorial"
php regular search and replacement preg_replace
preg_replace — Perform a regular expression search and replacement
Method description:
preg_replace ( $pattern , $replacement , $subject , $limit , $count)
Search for the part of the subject that matches pattern and replace it with replacement.
$limit, $count parameters are optional
limit: The maximum number of substitutions for each pattern on each subject. The default is -1 (unlimited).
count: If specified, will be filled with the number of completed substitutions.
Return value:
If subject is an array, preg_replace() returns an array, otherwise it returns a string.
If a match is found, the replaced subject is returned, otherwise the unchanged subject is returned. If an error occurs, NULL is returned.
Instance 1:
<?php
$PIWIK_API = 'filter_offset={offset}&period={period}&date={date}';
$patterns = array(
'/{offset}/',
'/{period}/',
'/{date}/'
);
$replacements = array(
33,
'day',
'216-11-11'
);
$url = preg_replace($patterns, $replacements, $PIWIK_API);
//结果： $url = "filter_offset=33&period=day&date=216-11-11"Instance 2:
<?php
$PIWIK_API = array(
'filter_offset' => '{offset}',
'period' => '{period}',
'date' => '{date}'
);
$patterns = array(
'/{offset}/',
'/{period}/',
'/{date}/'
);
$replacements = array(
33,
'day',
'216-11-11'
);
$url = preg_replace($patterns, $replacements, $PIWIK_API);
//结果：
/*
$url = array(3) {
["filter_offset"]=>
string(2) "33"
["period"]=>
string(3) "day"
["date"]=>
string(9) "216-11-11"
}
*/The above is the detailed content of How to implement search and replace in php regular. For more information, please follow other related articles on the PHP Chinese website!