I dont know how to fixe this error
Warning: preg_match(): Unknown modifier '[' in
my code is
while(list($k,$v)=each($con2)) {
$patt="($this->block_start_word|$this->block_end_word)[[:blank:]]*([0-9a-zA-Z\_]+)[[:blank:]]*$this->block_end_delim(.*)";
if (eregi($patt,$v,$res)) {
I want to update php version of eregi to preg_match and I tru this
while(list($k,$v)=each($con2)) {
$patt="($this->block_start_word|$this->block_end_word)[[:blank:]]*([0-9a-zA-Z\_]+)[[:blank:]]*$this->block_end_delim(.*)";
if ( preg_match($patt,$v,$res)) {
As you can see in this answer preg_match treats the first character as a delimiter How to change PHP's eregi to preg_match
Specifically you get the error because preg_match uses '(' as the delimiter and thus ends the pattern after ($this->block_start_word|$this->block_end_word) and errors on '['
Change the pattern to $patt="/($this->block_start_word|$this->block_end_word)[[:blank:]] ([0-9a-zA-Z_]+)[[:blank:]] $this->block_end_delim(.*)/";
And it should work, Goodluck!
OK, let's go over this regex:
"($this->block_start_word|$this->block_end_word)[[:blank:]]*([0-9a-zA-Z\\_]+)[[:blank:]]*$this->block_end_delim(.*)"
I presume you want:
$this->block_start_word
or $this->block_end_word
$this->block_end_delim
That in mind, how about
<?php
$handle = fopen('php://stdin', "r");
while (($line = fgets($handle, 4096)) !== false) {
$exp = '/';
$exp .= '(';
$exp .= '\$this\-\>block_start_word';
$exp .= '|';
$exp .= '\$this\-\>block_end_word';
$exp .= ')';
$exp .= '\s*'; // Like [[:blank:]]*
$exp .= '([0-9a-zA-Z\_]+)';
$exp .= '\s*'; // Like [[:blank:]]*
$exp .= '\$this\-\>block_end_delim';
$exp .= '(.*)/';
if(preg_match($exp,$line)) {
print $line;
}
}
?>
If $this->block_start_word
, $this->block_end_word
, and $this->block_end_delim
are set elsewhere in the PHP script:
<?php
$handle = fopen('php://stdin', "r");
while (($line = fgets($handle, 4096)) !== false) {
$exp = '/';
$exp .= '(';
$exp .= '$this->block_start_word;
$exp .= '|';
$exp .= '$this->block_end_word;
$exp .= ')';
$exp .= '\s*'; // Like [[:blank:]]*
$exp .= '([0-9a-zA-Z\_]+)';
$exp .= '\s*'; // Like [[:blank:]]*
$exp .= $this->block_end_delim;
$exp .= '(.*)/';
if(preg_match($exp,$line)) {
print $line;
}
}
?>
使用preg_match
您应该定义定界符,并且最好同时包含preg_quote
:
$patt="/(".preg_quote($this->block_start_word)."|".preg_quote($this->block_end_word."))[[:blank:]]*([0-9a-zA-Z\_]+)[[:blank:]]*".preg_quote($this->block_end_delim)."(.*)/";
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