I have a string of characters separated by many hashes (#). I need to get the individual words in between the hashes on php. here's what my code looks like:
$sql = "SELECT attribute_type.at_name,attribute_type.at_id FROM attribute_type
WHERE attribute_type.prodType_id = $pt_id
AND attribute_type.at_id NOT IN (SELECT at_id
FROM attribute_type
WHERE attribute_type.at_name = 'Product')";
while($items. strpos("#")>0){
// add the selected AT in every loop to be excluded
// .
// here tokens from $items are stored individually in
// $selectedAT (whose value changes in every loop/cycle)
//
// add to the current sql statement the values $at_id and $searchparam
$sql = $sql . "AND attribute_type.at_id NOT IN
(SELECT at_id FROM attribute_type
WHERE attribute_type.at_name = '$selectedAT')";
}
$dbcon = new DatabaseManager();
$rs = $dbcon->runQuery($sql);
explode creates an array by splitting a string on a given token
$words = explode("#", $items);
Now if you need to take these words you extracted from the string and use them to compare to some column in a SQL query...
$sql = "SELECT ... WHERE column IN ('" . implode("', '", $words) . "')";
You should not need to build a query in a loop as you are doing once you have the words in an array.
Even if you did want to do it that way, you don't want to create a subquery for every word when you could just OR the words together in one subquery.
Try strtok. Example paste:
$string = "This is\tan example\nstring";
$tok = strtok($string, " \n\t");
while ($tok !== false) {
echo "Word=$tok<br />";
$tok = strtok(" \n\t");
}
Do not use split as suggested in another answer (which has now been updated). It uses old POSIX regulat expressions and it's deprecated.
To split a string, use $words = explode('#', $items); which does not use a regular expression but a plain string.
Docref: http://php.net/explode
Related
I have a very long list of names and I am using preg_replace to match if a name from the list is anywhere in the string. If I test it with few names in the regex it works fine, but having in mind that I have over 5000 names it gives me the error "preg_replace(): Compilation failed: regular expression is too large".
Somehow I cannot figure out how to split the regex into pieces so it becomes smaller (if even possible).
The list with names is created dynamically from a database. Here is my code.
$query_gdpr_names = "select name FROM gdpr_names";
$result_gdpr_names = mysqli_query($connect, $query_gdpr_names);
while ($row_gdpr_names = mysqli_fetch_assoc($result_gdpr_names))
{
$AllNames .= '"/'.$row_gdpr_names['name'].'\b/ui",';
}
$AllNames = rtrim($AllNames, ',');
$AllNames = "[$AllNames]";
$search = preg_replace($AllNames, '****', $search);
The created $AllNames str looks like this (in the example 3 names only)
$AllNames = ["/Lola/ui", "/Monica\b/ui", "/Chris\b/ui"];
And the test string
$search = "I am Lola and my friend name is Chris";
Any help is very appreciated.
Since it appears that you can't easily handle the replacement from PHP using a single regex alternation, one alternative would be to just iterate each name in the result set one by one and make a replacement:
while ($row_gdpr_names = mysqli_fetch_assoc($result_gdpr_names)) {
$name = $row_gdpr_names['name'];
$regex = "/\b" . $name . "\b/ui";
$search = preg_replace($regex, '----', $search);
}
$search = preg_replace("/----/", '****', $search);
This is not the most efficient pattern for doing this. Perhaps there is some way you can limit your result set to avoid a too long single alternation.
Ok, I was debugging a lot. Even isolating everything else but this part of code
$search = "Lola and Chris";
$query_gdpr_names = "select * FROM gdpr_names";
$result_gdpr_names = mysqli_query($connect, $query_gdpr_names);
while ($row_gdpr_names = mysqli_fetch_assoc($result_gdpr_names)) {
$name = $row_gdpr_names['name'];
$regex = "/\b" . $name . "\b/ui";
$search = preg_replace($regex, '****', $search);
}
echo $search;
Still, print inside but not outside the loop.
The problem actually was in the database records. There was a slash in one of the records
I have Chinese php search queries.
I want to split up any query up into individual characters.
ex: 你好 (ni hao, hello) split into 你 and 好
my query is set like:
$q = $_REQUEST["q"];
the results I want to split is set up like:
$results4 = $db->query( "SELECT CHS, PIN, DEF FROM FOUR
WHERE CHS LIKE '%".$q."%' OR PIN LIKE '%".$q."%'");
while ($row4 = $results4->fetchArray()) {
How can I split up the keyword and look up all the components?
If you want it all in one query you will have to generate the whole query. If you were looking for an exact match you could use something similar to the in_array() function, but with LIKE it doesn't work.
You could however loop through the array of characters and put together the WHERE part programatically.
Like this
$where = array();
foreach ( $qtwo as $word ) {
$where[] = "CHS LIKE '%" . $word . "%'";
}
$where = implode(' OR ', $where);
Use this $where variable in your query
You can use str_split to convert a string in an array of chars
$chars = str_split($q)
In php, if I had a string of comma separated data like this which came from a database:
John,Paul,Ringo,George
how could I convert it to something like this, without using a for loop or any extra processing. Does php have a function that can do this?
$str = 'John','Paul','Ringo','George';
I currently split the string using explode and then reformat it. Anyway to achieve this without doing that?
The formatted string is sent to a SQL where it's used in a MySQL IN() function.
If you absolutely don't want to use explode() you could use
$str = 'John,Paul,Ringo,George';
$newStr = "'" . str_replace(",","','", $str) . "'";
You can use preg_replace with $1 thing.
UPDATED:
See usage example:
echo preg_replace('((\\w+)(,?))', '"$1"$2', 'John,Paul,Ringo,George');
you can use explode like below
$db_data = 'John,Paul,Ringo,George';//from your db
$l = explode(',',$db_data);
echo "select * from table where column IN('".implode("','",$l)."')";
output:
select * from table where column IN('John','Paul','Ringo','George')
You can use the explode and implode functions in PHP.
$names = explode(',', 'John,Paul,Ringo,George');
echo implode(',', $names);
I hope I got you right:
$str_1 = 'John,Paul,Ringo,George';
$str_2 = explode(',', $str_1);
$str_3 = implode('\',\'', $str_2);
$str_4 = '\''.$str_3.'\'';
echo $str_4;
Output: 'John','Paul','Ringo','George'
$l = 'John,Paul,Ringo,George';
$lx = "'" . implode("','", explode(",", $l)) . "'";
echo $lx; // 'John','Paul','Ringo','George'
I have a script which inserts all data in array to MYSQL. But when there is just a single word in the array, the script gives no error, while when there are multiple words, it gives a
Column count doesn't match value count at row 1
Here is my code
<?php
if($_SERVER['REQUEST_METHOD'] == 'POST') {
include("connect.php");
$counter = 0;
$counters = 0;
$string = mysql_real_escape_string($_POST['words']);
$arr = explode(" ", $string);
mysql_query("SET charset utf8");
$sql = mysql_query("SELECT `word` FROM unicode WHERE word IN ('".implode("', '", $arr) . "')") or die (mysql_error());
$dupes = array();
while($r = mysql_fetch_assoc($sql)) {
$dupes[] = $r['word'];
}
$newwords = array_diff($arr, $dupes);
if(count($newwords)) {
$word = implode("'),('", $newwords);
$md5 = md5($word);
$sqli = mysql_query("INSERT INTO unicode (word, word_hash) VALUES ('$word', '$md5')") or die (mysql_error());
}
}
?>
Please help....
As a rule, when I have problems with SQL I do the following things to track down the issue.
ECHO out the SQL query I am trying to run against the DB. This makes sure that I am passing the value of the variable and not the the text '$variable'.
Switch on and check the general.log table in the MySQL DB (assuming you are using MySQL). This will show you the last queries run against the DB and will prove one way or another if your script is even executing anything against the DB.
Lastly I am not as au fait with imploding etc as suggest above to comment, however I would also add the following. Looking at your query it looks as if you are doing I what I talked about in point 1.
$sqli = mysql_query("INSERT INTO unicode (word, word_hash) VALUES ('$word', '$md5')") or die (mysql_error());
The single quotes around $word and $md5 would mean literally pass $word and $md5 into the DB. When using variables within double quote " ... " you do not need to put anything around them just use them as is. Or if you would like to use single quote marks you can concatenate the query string.
$sqli = mysql_query('INSERT INTO unicode (word, word_hash) VALUES ( ' . $word . ', ' . $md5 . ')') or die...
Again echo out the query as you have it (without the mysqli_query function) to confirm.
Hope this helps.
S
You're imploding $newwords, so the resulting query would look something like:
...VALUES ('word1'),('word2'),('word3', 'md5 string')
Add $md5 to implode():
$md5 = 'md5 string';
$word = implode("', '$md5'),('", array('word1', 'word2', 'word3'));
Outputs:
...VALUES ('word1', 'md5 string'),('word2', 'md5 string'),('word3', 'md5 string')
The number of column parameters in your INSERT query is more than 2, but you've only provided 2 values.
$word = implode("'),('", $newwords);
This statement here is the culprit. When you implode the $newwords array, you'd probably get more than 2 values. When inserted into the MySQL query, it won't match with the number of VALUES you've provided. That's causing the error.
I have a form which is a select multiple input which POSTs values like this: option1,option2,option3 etc..
How is the best way to convert this to 'option1','option2','option3' etc...
Currenty I'm doing this, but it feels wrong??
$variable=explode(",", $variable);
$variable=implode("','", $variable);
The reason why I'm doing this is because I want to use the form select multiple inputs in a SQL Query using IN.
SELECT * FROM TABLE WHERE some_column IN ('$variable')
You can wrap whatever code in a function to make the "feels wrong" feeling disapear. E.g.:
function buildSqlInClauseFromCsv($csv)
{
return "in ('" . str_replace(",", "','", $csv) . "') ";
}
If $variable = "option1,option2,option3"
you can use:
"SELECT * FROM TABLE WHERE FIND_IN_SET(some_column, '$variable')"
Here is what I used:
WHERE column IN ('".str_replace(",", "','", $_GET[stringlist])."')
we know that implode converts array to string,we need to provide the separator and then array as shown below, here we have (coma ,) as a separator.
Implode breaks each element of an array with the given separator,I have conceited '(single quotes) with the separator.
$arr = array();
$arr[] = "raam";
$arr[] = "laxman";
$arr[] = "Bharat";
$arr[] = "Arjun";
$arr[] = "Dhavel";
var_dump($arr);
$str = "'".implode("','", $arr)."'";
echo $str;
output: 'raam','laxman','Bharat','Arjun','Dhavel'
There is only one correct way to escape strings for SQL - use the function provided by the database api to escape strings for SQL. While mysyl_* provides mysql_real_escape_string():
$choices = explode(",", $variable);
foreach($choices as &$choice)
$choice = "'".mysql_real_escape_string($choice)."'";
$choices = implode(",", $choices);
PDO provides a method that will add quotes at the same time:
$choices = explode(",", $variable);
foreach($choices as &$choice)
$choice = $pdoDb->quote($choice);
$choices = implode(",", $choices);
Note that PDO::prepare doesn't really work here