PHP: Difference between revisions

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== References ==
== References ==
* [http://php.net/manual/en/langref.php Language reference on php.net]
TBC
* [http://www.w3schools.com/php/default.asp php tutorial on w3schools.com] (check the menu on the left)
:* [http://www.w3schools.com/php/php_ref_string.asp string functions]

Cheat sheets:
* [https://dzone.com/refcardz/php-54-scalable php DZone cheat sheet]


== Syntax ==
== Syntax ==

Revision as of 23:45, 2 January 2016

References

Cheat sheets:

Syntax

/* arrays */
$attr = array();          // an empty array
$attr = array("border"=>"myborder", "mode"=>"mymode");   // associative array

/* strings */
'abc' . 'def'                                     // concatenation
"abc $var def"                                    // variable reference in strings
$s=str_replace("\n","",$s);                       // Replace a substring in a string
$s=str_replace(array("\r","\n","\t"," "),"",$s;   // ... idem, with several substrings (also support several "replace" strings)

/* constant */
NULL;              // The null reference

Unicode support

  • First, if PHP file contains special character, make sure the PHP file is encoded in UTF-8:
file -bi FenTT.php           # To get current encoding
iconv -f $encoding -t UTF-8 -o FenTT.out.php FenTT.php        # Specify correct source $encoding as given above (note that converting us-ascii is useless)
  • Specify the default multi-byte encoding:
mb_internal_encoding("UTF-8");
  • Next store unicode char as follows [1]:
$S = '\u2654\u2655\u2656\u2657';
$S = json_decode('"'.$S.'"');
  • Then access the string using the multi-byte API [2], like [3]:
$D = mb_substr($S,2,1);    // instead of $D=$S[2]