بسم الله الرحمن الرحيم

// TODO: // FIXME: // BUG: // NOTE: // HACK: // COMMENT: // [ ]: // [x]:

PHP

• class

 class car {
   public $name;
   function set_name($name){
   $this->name = $name ;
   }
   function get_name(){
   $this->name;
   }
  }

know the type

gettype ();

know the type and the content and length

var_dump();

know the content of array

print_r();

know the type is string

is_string();

know the type is int

is_int();

know the type is boolean

is_bool();

know the type is double(float)

is_double(); is_float();

know the variable is number from string

is_numeric('');

know the variable is set

isset();

to define a constants

define('const_name',const_val);

to print a constants

echo const_name;

to change a string to number

$strNumber = '12.31'; $number = (float)$strNumber;

or

$strNumber = '12.31'; $number = floatval($strNumber);

to format number

number_format($number , num_to_splits ,dismal_sing, splits );

to get string length

strlen($string);

to trim string

trim($string);

to trim left of string

ltrim($string);

to trim right of string

rtrim($string);

to count word of string

str_word_count($string);

to revers string

strrev($string);

to upper case string

strtoupper($string);

to lower case string

strtolower($string);

to search word in string(case sensitive)

strpos($string,'word');

to search word in string(not case sensitive)

stripos($string,'word');

to replace word in string(case sensitive)

str_replace('word','word_to_replace',$string,);

to replace word in string(not case sensitive)

str_ireplace('word','word_to_replace',$string,);

to cut word from string

substr($string,pos_to_cut,length_of_string_left);

to print string as it is with breaks

echo nl2br($string);

to print string as it is with html tags

echo htmlentities($string);

to print array length

echo count($array);

to add to the end of array

$array[] = $item;

or

array_push($array,$item);

to remove from the end of array

array_pop($array); //and it well return that item

to add to the first of array

array_unshift($array,$item);

to remove from the first of array

array_shift($array); //and it well return that item

to make array from string

explode('sprat',$string);

to make string from array

implode('sprat',$array);

to search item in array

in_array($item,$array);

to search item index in array

array_search($item,$array);

to merge two arrays

array_merge($array1,$array2);

or

[...$array1,...$array2];

to sort array

sort($array);

to reverse sort array

rsort($array);

if not true do

$array[index]??="def_val";

or

$item ?: do_val;

if true do or do (ternary if)

$item > conditione ? true_do : false_do ;

to print array values

array_values($array);

sort array by keys

ksort($array);

sort array by values

asort($array);