<?php
//remove words which have more than 5 characters from string
$s = 'abba bbbbbbbbbbbb 1234567 zxcee ytytytytytytytyt zczc xyz';
$patterns = array(
'long_words' => '/[^\s]{5,}/',
'multiple_spaces' => '/\s{2,}/'
);
$replacements = array(
'long_words' => '',
'multiple_spaces' => ' '
);
echo trim(preg_replace($patterns, $replacements, $s));
?>
输出:
abba zczc xyz
更新,以解决您的意见提出的问题。你可以这样说:
<?php
//remove words which have more than 5 characters from string
$s = '123 ReallyLongStringComesHere 123';
$patterns = array(
'html_space' => '/ /',
'long_words' => '/[^\s]{5,}/',
'multiple_spaces' => '/\s{2,}/'
);
$replacements = array(
'html_space' => ' ',
'long_words' => '',
'multiple_spaces' => ' '
);
echo str_replace(' ', ' ', trim(preg_replace($patterns, $replacements, $s)));
?>
输出:
123 123
@stereofrog - 是的,我应该已经定义了更好,它可以是任何字符 –