1. Splitting and merging
Implode:
Echo Implode (",", Array (' LastName ', ' email ', ' phone '));//Array to string
Explode
Print_r (Explode (",", ' Lastname,email,phone '));//String to array
Split
Print_r (Split ("[/.-]", "2008-9.12"));//or. Or-any symbol is cut into an array
Str_split:
Print_r (Str_split ("Hello Friend", 1));//Cut the string
Preg_split:
Regular segmentation
$ops = Preg_split ("{[+*/-]}", "3+5*9/2");
Print_r ($ops);//return: Array ([0] = 3 [1] = 5 [2] = 9 [3] = 2)
Http_build_query:
Request string after generating url-encoded
$data = Array (' localhost ' = ' AA ',
' User ' = ' BB ',
' Password ' = ' cc ');
echo Http_build_query ($data);//return: LOCALHOST=AA&USER=BB&PASSWORD=CC
Strtok
Cut a string into small pieces
$string = "This Is\tan example\nstring";
Echo strtok ($string, "\n\t");//return: This is
Echo ';
Echo strtok ("\n\t"); When the second time returns: an example
Echo ';
Echo strtok ("\n\t"); When the third time returns: string
2. Find and replace
Many of the strings are r: Take the Last, I: Case insensitive
echo $pos = Strpos (' abcdef abcdaef ', ' a '); The position of the first occurrence of the letter A, case-sensitive
echo $pos = Strrpos (' abcdef abcdeaf ', ' a '); The position of the last occurrence of the letter A, case-sensitive
Stripos: Case insensitive
Strripos: Case insensitive
echo strstr (' user@exa@mple.com ', ' @ ');//return: @exa @mple.com
STRISTR: Case insensitive
echo strchr (' user@exa@mple.com ', ' @ ');//return: @exa @mple.com
STRRCHR: Then return: @mple. com,
Preg_grep:
Returns the array cell that matches the pattern
$food = Preg_grep ("/^p/", Array ("Apple", "Orange", "Pip", "banana"));
Print_r ($food); return: Array ([2] = PIP)
STRTR:
Replaces the found string with the specified array
$arr = Array ("www" = "ftp", "yahoo" = "Baidu");
Echo strtr ("www.yahoo.com", $arr);//return: ftp.baidu.com
Echo strtr ("www.yahoo.com", "Wo", "SX");//return: SSS.YAHXX.CXM Translate string Replace all w with s and replace all o with X
STRSPN:
To find out the length of the original part.
Echo strspn ("ABCDEFG", "1234567890");//return: 0
Find out the length of the initial part without
Echo strcspn ("ABCDEFG", "1234567890");//return: 7
3. Regular
Preg_match:
Returns the number of times that pattern matches. Either 0 times (no match) or 1 times, because Preg_match () stops searching after the first match.
if (Preg_match ("/php/i", "PHP is the Web scripting language of choice."))
echo "exists";
Else
echo "does not exist";
Preg_match_all:
Instead, it searches until the end of the subject.
Preg_match_all ("/\ (?) ( \d{3})? \)? (? (1) [\-\s]) \d{3}-\d{4}/x ",
"Call 555-1212 or 1-800-555-1212", $phones);
Print_r ($phones [0]);//Get all the phone numbers
Ereg_replace:
Replace URL with Hyper-join
Echo ereg_replace ("[[: alpha:]]+://[^<>[:space:]]+[[:alnum:]/]",
"\\0", ' This is Baidu http://www.baidu.com website. ');
Preg_replace: Filter
$search = Array ("' Si",//Remove JavaScript
"' <[\/\!] *? [^<>]*?> ' Si ',//Remove HTML tags
"' ([\ r \ n]) [\s]+ '",//Remove whitespace characters
"' & (quot| #34); ' I ",//Replace HTML entity
"' & (amp| #38); ' I ",
"' & (lt| #60); ' I ",
"' & (gt| #62); ' I ",
"' & (nbsp| #160); ' I ",
"' & (iexcl| #161); ' I ",
"' & (cent| #162); ' I ",
"' & (pound| #163); ' I ",
"' & (copy| #169); ' I ",
"' (\d+); ' E "); Run as PHP code
$replace = Array ("",
"",
"\\1",
"\"",
"&",
"<",
">",
" ",
Chr (161),
Chr (162),
Chr (163),
Chr (169),
"Chr (\\1)");
echo $text = Preg_replace ($search, $replace, '
Test');
Preg_quote:
Escape the regular expression character, add each to add \, conform to the regular formula.
Echo preg_quote (' $ g3/400 for a ', '/');//return: \$40 for a g3\/400
Sql_regcase:
Produces a regular expression for a match that is not size-sensitive
Echo sql_regcase ("Foo-bar.a"); return: [FF][OO][OO]-[BB][AA][RR]. [Aa]
4.URL encoding processing function
UrlEncode:
echo $str = UrlEncode (' http://www.baidu.com?key= Baidu ');//Encoding
echo UrlDecode ($STR);//decoding
Rawurlencode:
A sequence of percent semicolons (%) followed by a two-digit hexadecimal number is replaced with a literal character
Note: Rawurldecode () does not decode the plus sign (' + ') to a space, while UrlDecode () can.
echo $str = Rawurlencode (' http://www.baidu.com?key= Baidu ');//Encoding
echo Rawurldecode ($STR);
Parse_url:
Parse the URL and return its components
Print_r (Parse_url ("Http://username:password@hostname/path?arg=value#anchor"));
PARSE_STR:
is to parse the URL into a variable
$str = "id=1&name=2";
Parse_str ($STR);
Echo $name;
When there is a second argument, the value is stored in the array
$str = "id=1&name=2";
Parse_str ($str, $array);
Print_r ($array);
5. Time function
Mktime
Convert Date to Timestamp
Echo Time ()-mktime (0,0,0,9,17,2008);//return: The difference between the current and September 17, 2008.
echo Date (' y-m-d h:i:s ');//Current date and time
GetDate
Get Date/Time information
Print_r (GETDATE (Time ()));
6. Compare
Similar_text:
Compare the similarity of two strings
$a = "Hellohhh6";
$b = "hello3hh";
Echo similar_text ($a, $b);//return: 6 Compare how many identical characters are in the corresponding position
echo "
";
Similar_text ($a, $b, $similar);
echo $similar. " %"; Output percent of the same character
Soundex
Compare the pronunciation of two words
$a = "DdHello6";
$b = "Hello3";
Echo soundex ($a). "
";
Echo Soundex ($b). "
";
if (Soundex ($a) ==soundex ($b)) echo "pronounced the same"; else echo ' different ';
STRNATCMP ():
string comparison by natural sorting method
$arr = Array ("A1.jpg", "a2.jpg", "a3.jpg", "a4.jpg");
$max = $arr [0];
for ($i =0; $i {
if (strnatcmp ($arr [$i], $max) >0)
$max = $arr [$i];
}
echo $max;//return: A4.jpg
strcmp
Case-sensitive, string comparison by Byte, return when the first string is greater than the second string: 1, equals return: 0, less than return: 1
echo strcmp (' abc ', ' abc ');
STRCASECMP:
Returns the number of differences between two strings
echo strcasecmp (' WBC ', ' BBC ');//return: 21
strncmp
A string pair that specifies the number of characters, this function is similar, and, unlike that, you can specify the number of characters to be used for a pair of strings. If any one string is shorter than Len, the length of that string is used to compare the
echo strncmp ("Adrdvark", "Aardwolf", 4);//return: 1
7. Sorting
Sort
Rearrange the values of an array by a-Z
$a = Array ("1", "s", "3", "N", "5");//return: 1,3,5,n,s
Sort ($a);//Sort print_r ($a);
8. Other
Str_pad:
The padding string becomes the specified length, Pad_type can be str_pad_right, str_pad_left, or Str_pad_both
Echo Str_pad ("www.yahoo.com", "N", "_", str_pad_both);//The Fill function of the string __www.yahoo.com__
strlen ("AAA");//Find the length of the array return: 3
Strrev ();//The reversal of the string
Strtolower ();//Convert to lowercase
Strtoupper ();//Convert to uppercase
Str_replace () Replaces a string, case-sensitive str_ireplace () is case insensitive
Ucfirst ();//Convert first letter to uppercase
Ucwords ();//Convert the first letter of each word to uppercase
echo Join ("&", Array (' Wo ', ' Men ', ' Shi '));//String connection return: Wo&men&shi with & Connected
Count_chars:
Returns information about the characters used in a string
Print_r (Count_chars ("Hellohhh6", 0));//Returns the number of occurrences of each byte value (0~255) in the string as an array of values. 0 list all of them. 1 columns are more than 0 occurrences. 2 occurrences of a column are equal to 0. 3 Returns a string that consists of the byte values that are used. such as: 6Hehlo. 4 returns a string consisting of unused byte values
Str_replace:
Str_replace ("Yahoo", "Baidu", "www.yahoo.com");
$c = "www.yahoo.com";
$arr = Array ("yahoo", "com");
Echo Str_replace ($arr, "Baidu", $c);//return: Www.baidu.baidu
$c = "www.yahoo.com";
$arr 1 = Array ("www", "yahoo", "com");
$arr 2 = Array ("FTP", "Baidu", "net");
Echo Str_replace ($arr 1, $arr 2, $c);//return: Ftp.baidu.net
substr ($a, 2,2);//extract substring
Echo Substr_count ("This was a test", "is");//The number of occurrences of the statistic substring
Substr_replace ();//Replace substring
$url = "http://localhost/zheng_ze_biao_da/youxiang.php";
Echo substr ($url, Strrpos ($url, "/") +1);//return: Youxiang.php used to return file name
Str_word_count:
$a = "i/love/you/";
echo Str_word_count ($a);//return: 3 number of words in the statistical string
Print_r (Str_word_count ($a, 1));//return: Array ([0] = I [1] = love [2] = = You)
Print_r (Str_word_count ($a, 2));//return: Array ([0] = I [3] = love [9] = = You)
Print_r (Str_word_count ($a, 1, "/")), Return: Array ([0] = i/[1] = love/[2] = = you/) Here is the Ignore "/"
http://www.bkjia.com/PHPjc/327511.html www.bkjia.com true http://www.bkjia.com/PHPjc/327511.html techarticle 1. Split and merge Implode:echo implode (",", Array (' LastName ', ' email ', ' phone '));//array to String Explode:print_r (Explode (",", ' Lastname,email,phone '));//String to array ...
