PHP find string knowing only beginning of it - php

Question

Hello i'm trying to find a the rest of the string knowing only the beginning of it.
Example:
I have start of string Dude=99999
Number 99999 changes its not always the same but word Dude is always the same.
So my question is how can i find the rest of the string after word Dude...
I know in linux there is something like t*.txt but in php? help please.
SHORT: find 'dude= and read the string until '

Answer 1

This sounds like a good match for a regex:
$regex = "/\'Dude=([0-9]+)\'/";
$str = "'Duck=123456' 'Chicken=982731' 'Dude=123487' 'Boat=129832'";
preg_match_all($regex, $str, $matches, PREG_SET_ORDER, 0);
echo $matches[0][1]; // prints: 123487
If your input string/text has line-breaks, you will probably need additional flags for the regex matcher. But there are already questions and answers for this available, so please refer to the search.

Answer 2

You should use "str_replace()" function for this
echo str_replace("dude=","","dude=99999");
Here first parameter your fix string which would be start as above , second parameter is replacement string, which is put as empty , third parameter is your actual string

Answer 3

If you're going to check all lines for different strings you can do as I have done recently:
// loop through all uploaded files:
for ($key = 0; $key < count($_FILES['file']['tmp_name']); $key++) {
// make an array of lines from a single file:
$txt_file = file($_FILES['file']['tmp_name'][$key]);
// loop through this array, line by line:
foreach ($txt_file as $line) {
// if your file is not utf-8 fix the encoding:
$line = iconv("windows-1251", "utf-8", $line);
// check if this string begins with 'Dude=':
if (substr($line, 0, strlen('Dude=')) === 'Dude=') {
// if yes, then trim the 'Dude=' and get what's after it:
$found_value[$key]['dude'] = trim(substr($line, strlen('Dude=')));
// if this string begins with 'Dude=' it cannot begin with something else,
// so we can go straight to the next cycle of the foreach loop:
continue;
// check if this string begins with 'Something else=':
} elseif (substr($line, 0, strlen('SomethingElse=')) === 'SomethingElse=') {
// if yes, then trim the 'SomethingElse=' and get what's after if:
$found_value[$key]['something_else'] = trim(substr($line, strlen('SomethingElse=')));
// if there's more items to find in the string use 'continue' to shorten server's work
continue;
}
}
}
I've adapted and commented it for you. Also you probably want to check if file(s) was uploaded properly, so you can use file_exists and is_uploaded_file
In the end you will get an array with structure like this:
$found_value [
1 => array()[
'dude' => 9999999
'something_else' => 'hello'
]
2 => array()[
'dude' => 3765234
'something_else' => 'hello again'
]
]