Organizing common string processing code snippets in PHP_PHP Tutorial

Remove HTML tags

Copy code The code is as follows:

$text = strip_tags($input, "") ;

The above function mainly uses strip_tags, please refer to the specific usage instructions.
Return the text between $start and $end

Copy code The code is as follows:

function GetBetween($content ,$start,$end){
$r = explode($start, $content);
if (isset($r[1])){
$r = explode($end, $ r[1]);
return $r[0];
}
return '';
}

Convert url to link

Copy code The code is as follows:

$url = "Jean-Baptiste Jung (http://www.jb51.net)";
$url = preg_replace("#http://([A-z0-9./-]+)#", '$0< /a>', $url);

Split the string into 140 characters

Copy code The code is as follows:

function split_to_chunks($to,$text){
$total_length = (140 - strlen($to));
$text_arr = explode(" ",$text);
$i=0;
$message[0]="";
foreach ($text_arr as $word){
if ( strlen($message[$i] . $word . ' ' ) <= $total_length ){
if ($text_arr[count($text_arr)-1] == $word){
$message[$i] .= $word;
} else {
$message[$i] .= $word . ' ';
}
} else {
$i++;
if ($text_arr[count($text_arr)-1] = = $word){
$message[$i] = $word;
} else {
$message[$i] = $word . ' ';
}
}
}
return $message;
}

Delete the URL in the string

Copy code The code is as follows :

$string = preg_replace('/b(https?|ftp|file)://[-A-Z0-9+&@#/%?=~_|$!: ,.;]*[A-Z0-9+&@#/%=~_|$]/i', '', $string);

Convert the string to SEO friendly String of

Copy code The code is as follows:

function slug($str){
$str = strtolower( trim($str));
$str = preg_replace('/[^a-z0-9-]/', '-', $str);
$str = preg_replace('/-+/ ', "-", $str);
return $str;
}

Parsing CSV files

Copy code The code is as follows:

$fh = fopen("contacts.csv", "r");
while($line = fgetcsv($fh, 1000, ",") ) {
echo "Contact: {$line[1]}";
}

　String search

Copy code The code is as follows:

function contains($str, $content, $ignorecase=true){
if ($ignorecase){
$str = strtolower($str );
$content = strtolower($content);
}
return strpos($content,$str) ? true : false;
}

　 Check characters Whether the string starts with a certain string

Copy code The code is as follows:

function String_Begins_With($needle, $haystack {
return (substr($haystack, 0, strlen($needle))==$needle);
}

　Extract email address from string

Copy code The code is as follows:

function extract_emails($str){
// This regular expression extracts all emails from a string:
$ regexp = '/([a-z0-9_.-])+@(([a-z0-9-])+.)+([a-z0-9]{2,4})+/i' ;
preg_match_all($regexp, $str, $m);

return isset($m[0]) ? $m[0] : array();
}

$test_string = 'This is a test string...

test1@example.org

Test different formats:
test2@example.org;
foobar


strange formats:
test5@example.org
test6[at ]example.org
test7@example.net.org.com
test8@ example.org
test9@!foo!.org

foobar
';

print_r(extract_emails($test_string));

http://www.bkjia.com/PHPjc/324426.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/324426.htmlTechArticleRemove HTML tags and copy the code as follows: $text = strip_tags($input, ""); The above function Mainly using strip_tags, please refer to the specific usage instructions. Returns between $start and $end...