Detailed explanation and example code of PHP array processing function extract

php array processing function extract

extract function is used to import variables from the array into the current symbol table

Basic syntax

int extract (array &$var_array [, int $extract_type = EXTR_OVERWRITE [, string $prefix = NULL ]] )

This function is used to import variables from the array into the current symbol table. Each key name is checked to see if it can be used as a legal variable name, and is also checked for conflicts with existing variable names in the symbol table.

Parameter introduction:

Return value

Returns the number of variables successfully imported into the symbol table.

Example:

<?php
$size = "large";
$var_array = array(
  "color" => "blue",
  "size" => "medium",
  "shape" => "sphere"
);
extract($var_array, EXTR_PREFIX_SAME, "wddx");
echo " $color , $size , $shape , $wddx_size <br/>";
?>

Run result:

blue, large, sphere, medium

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