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Detailed explanation and example code of PHP array processing function extract

高洛峰
高洛峰Original
2016-12-30 11:27:231354browse

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:

php 数组处理函数extract详解及实例代码

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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