Example analysis of PHP array operation

The example of this article analyzes the PHP array operation. Share to everyone for your reference, specific as follows:

An array of PHP is an important part of it. Examples of actions are as follows:

<?php FUNCTIONBR () { Echo ' <br/>===============================================<br/> '; } $arr 1=array (); $arr 1[] = ' x '; $arr 1[] = ' a '; $arr 1[] = ' e '; $arr 1[] = ' C '; $arr 1[] = ' h '; Adding an array Array_push ($arr 1, 3, 23, 55); Array length Echo ' The size of array is: '. Count ($arr 1). <br/> '; Reverse Var_dump (Array_reverse ($arr 1)); Sort-Direct action on an array Sort ($arr 1); Var_dump ($arr 1); Sort-Sort by string Sort ($arr 1, sort_string); Var_dump ($arr 1); Range $arr 2= Range (' A ', ' H '); Connection $arrTemp 1= implode ('-', $arr 2); ECHO$ARRTEMP1; echo ' <br/> '; Cutting Echo ' ['. Implode ('], array_reverse (Explode ('-', $arrTemp 1)). ' Array merging, which will rearrange the indexes $arr 3=array_merge ($arr 1, $arr 2); Var_dump ($arr 3); To delete an array element Array_shift ($arr 3); Array_pop ($arr 3); Unset ($arr 3[4]); Array_splice ($arr 3, 6, 2); Var_dump ($arr 3); Extract array, the original array is unchanged $arr 4=array_slice ($arr 3, 2,3); Var_dump ($arr 4); Associative arrays $fruits =array (' Red ' => ' apple ', ' yellow ' => ' banana ', ' green ' => ' lime '); Array keys $colors =array_keys ($fruits); Array value $fla =array_values ($fruits); Var_dump ($colors); Var_dump ($FLA); Find Echoin_array (' green ', $colors); echo ' <br/> '; Echoin_array (' black ', $colors)? ' In ': ' Isn't in '; echo ' <br/> '; Echoarray_key_exists (' Yellow ', $fruits); echo ' <br/> '; Sort keys Ksort ($fruits); Var_dump ($fruits); Sort by value Asort ($fruits); Var_dump ($fruits); Cycle foreach ($fruitsas $key=> $value) { Echo$key ' => '. $value. ' <br/> '; } echo ' <br/> '; $f = $fruits; while ($elem = each ($f)) { echo$elem[' key '. '-'. $elem [' value ']. ' <br/> '; } echo ' <br/> '; $arr 5=array (2, 8, 100, 33,-18); Find the maximum minimum value Echomax ($arr 5); echo ' <br/> '; Echomin ($arr 5); echo ' <br/> '; Echoarray_sum ($arr 5); echo ' <br/> '; Functiondouble ($x) { Echo ($x * 2). ' '; } Array element Application function Array_walk ($arr 5, ' double '); Functioncheck ($x) { Return$x> 20; } Screening Var_dump (Array_filter ($arr 5, ' check ')); $arr 6= Range (1,10); Echo ' Random number: '. Array_rand ($arr 6); Statistics Count (); sizeof (); Array_count_values (); $arr 7=array (4,5,1,2,3,1,2,1); $ac =array_count_values ($arr 7); Count the occurrences of each value Var_dump ($AC); $arr 8=array (' key1 ' => ' v1 ', ' key2 ' => ' v2 ', ' Key3 ' => ' v3 '); Extract ($arr 8); echo "$key 1 $key 2 $key 3"; Fill $input =array (12,10,9); Var_dump (Array_pad ($input, 5, 0)); Var_dump (Array_pad ($input,-5, 0)); ?>