我必须在 Wordpress 中将文件名更改为图像/文件名和文件/文件名，最后我使用了 WP-CLI 的搜索替换功能。
这是我执行的shell命令：
wp search-replace '(")(5\.jpg)' 'images/${2}' wp_postmeta --regex --regex-delimiter='/' --dry-run --skip-columns=meta_key --debug=true
这给了我回信息：0 replacements to be made。
这是数据库中的一个条目：
a:5:{s:5:"width";i:2048;s:6:"height";i:1536;s:4:"file";s:5:"5.jpg";s:5:"sizes";a:4:{s:9:"thumbnail";a:4:{s:4:"file";s:13:"5-150x150.jpg";s:5:"width";i:150;s:6:"height";i:150;s:9:"mime-type";s:10:"image/jpeg";}s:6:"medium";a:4:{s:4:"file";s:13:"5-300x225.jpg";s:5:"width";i:300;s:6:"height";i:225;s:9:"mime-type";s:10:"image/jpeg";}s:12:"medium_large";a:4:{s:4:"file";s:13:"5-768x576.jpg";s:5:"width";i:768;s:6:"height";i:576;s:9:"mime-type";s:10:"image/jpeg";}s:5:"large";a:4:{s:4:"file";s:14:"5-1024x768.jpg";s:5:"width";i:1024;s:6:"height";i:768;s:9:"mime-type";s:10:"image/jpeg";}}s:10:"image_meta";a:12:{s:8:"aperture";s:1:"0";s:6:"credit";s:0:"";s:6:"camera";s:0:"";s:7:"caption";s:0:"";s:17:"created_timestamp";s:1:"0";s:9:"copyright";s:0:"";s:12:"focal_length";s:1:"0";s:3:"iso";s:1:"0";s:13:"shutter_speed";s:1:"0";s:5:"title";s:0:"";s:11:"orientation";s:1:"0";s:8:"keywords";a:0:{}}}
我创建了一个自定义 PHP 脚本，如下所示：
$data = 'a:5:{s:5:"width";i:2048;s:6:"height";i:1536;s:4:"file";s:5:"5.jpg";s:5:"sizes";a:4:{s:9:"thumbnail";a:4:{s:4:"file";s:13:"5-150x150.jpg";s:5:"width";i:150;s:6:"height";i:150;s:9:"mime-type";s:10:"image/jpeg";}s:6:"medium";a:4:{s:4:"file";s:13:"5-300x225.jpg";s:5:"width";i:300;s:6:"height";i:225;s:9:"mime-type";s:10:"image/jpeg";}s:12:"medium_large";a:4:{s:4:"file";s:13:"5-768x576.jpg";s:5:"width";i:768;s:6:"height";i:576;s:9:"mime-type";s:10:"image/jpeg";}s:5:"large";a:4:{s:4:"file";s:14:"5-1024x768.jpg";s:5:"width";i:1024;s:6:"height";i:768;s:9:"mime-type";s:10:"image/jpeg";}}s:10:"image_meta";a:12:{s:8:"aperture";s:1:"0";s:6:"credit";s:0:"";s:6:"camera";s:0:"";s:7:"caption";s:0:"";s:17:"created_timestamp";s:1:"0";s:9:"copyright";s:0:"";s:12:"focal_length";s:1:"0";s:3:"iso";s:1:"0";s:13:"shutter_speed";s:1:"0";s:5:"title";s:0:"";s:11:"orientation";s:1:"0";s:8:"keywords";a:0:{}}}';
if (preg_match('/(")(5\.jpg)/', $data)) {
echo "A match was found.";
} else {
echo "A match was not found.";
}
echo '<br>';
$data = preg_replace( '/(")(5\.jpg)/', 'images/${2}', $data );
var_dump($data);
这可以很好地替换数据，我得到的结果为
a:5:{s:5:"width";i:2048;s:6:"height";i:1536;s:4:"file";s:5:"images/5.jpg" ...
这是 WP-CLI search-replace 的源代码：
<?php
namespace WP_CLI;
class SearchReplacer {
private $from, $to;
private $recurse_objects;
private $regex;
private $regex_flags;
private $regex_delimiter;
private $logging;
private $log_data;
private $max_recursion;
/**
* @param string $from String we're looking to replace.
* @param string $to What we want it to be replaced with.
* @param bool $recurse_objects Should objects be recursively replaced?
* @param bool $regex Whether `$from` is a regular expression.
* @param string $regex_flags Flags for regular expression.
* @param string $regex_delimiter Delimiter for regular expression.
* @param bool $logging Whether logging.
*/
function __construct( $from, $to, $recurse_objects = false, $regex = false, $regex_flags = '', $regex_delimiter = '/', $logging = false ) {
$this->from = $from;
$this->to = $to;
$this->recurse_objects = $recurse_objects;
$this->regex = $regex;
$this->regex_flags = $regex_flags;
$this->regex_delimiter = $regex_delimiter;
$this->logging = $logging;
$this->clear_log_data();
// Get the XDebug nesting level. Will be zero (no limit) if no value is set
$this->max_recursion = intval( ini_get( 'xdebug.max_nesting_level' ) );
}
/**
* Take a serialised array and unserialise it replacing elements as needed and
* unserialising any subordinate arrays and performing the replace on those too.
* Ignores any serialized objects unless $recurse_objects is set to true.
*
* @param array|string $data The data to operate on.
* @param bool $serialised Does the value of $data need to be unserialized?
*
* @return array The original array with all elements replaced as needed.
*/
function run( $data, $serialised = false ) {
return $this->_run( $data, $serialised );
}
/**
* @param int $recursion_level Current recursion depth within the original data.
* @param array $visited_data Data that has been seen in previous recursion iterations.
*/
private function _run( $data, $serialised, $recursion_level = 0, $visited_data = array() ) {
// some unseriliased data cannot be re-serialised eg. SimpleXMLElements
try {
if ( $this->recurse_objects ) {
// If we've reached the maximum recursion level, short circuit
if ( $this->max_recursion != 0 && $recursion_level >= $this->max_recursion ) {
return $data;
}
if ( is_array( $data ) || is_object( $data ) ) {
// If we've seen this exact object or array before, short circuit
if ( in_array( $data, $visited_data, true ) ) {
return $data; // Avoid infinite loops when there's a cycle
}
// Add this data to the list of
$visited_data[] = $data;
}
}
if ( is_string( $data ) && ( $unserialized = @unserialize( $data ) ) !== false ) {
$data = $this->_run( $unserialized, true, $recursion_level + 1 );
}
elseif ( is_array( $data ) ) {
$keys = array_keys( $data );
foreach ( $keys as $key ) {
$data[ $key ]= $this->_run( $data[$key], false, $recursion_level + 1, $visited_data );
}
}
elseif ( $this->recurse_objects && is_object( $data ) ) {
foreach ( $data as $key => $value ) {
$data->$key = $this->_run( $value, false, $recursion_level + 1, $visited_data );
}
}
else if ( is_string( $data ) ) {
if ( $this->logging ) {
$old_data = $data;
}
if ( $this->regex ) {
$search_regex = $this->regex_delimiter;
$search_regex .= $this->from;
$search_regex .= $this->regex_delimiter;
$search_regex .= $this->regex_flags;
$data = preg_replace( $search_regex, $this->to, $data );
} else {
$data = str_replace( $this->from, $this->to, $data );
}
if ( $this->logging && $old_data !== $data ) {
$this->log_data[] = $old_data;
}
}
if ( $serialised )
return serialize( $data );
} catch( Exception $error ) {
}
return $data;
}
/**
* Gets existing data saved for this run when logging.
* @return array Array of data strings, prior to replacements.
*/
public function get_log_data() {
return $this->log_data;
}
/**
* Clears data stored for logging.
*/
public function clear_log_data() {
$this->log_data = array();
}
}
我使用的和这里使用的完全相同preg_replace，
$data = preg_replace( $search_regex, $this->to, $data );
为什么这在 WP-CLI 中不起作用？