Initialize a persistent cURL share handle with the given share options. Unlike curl_share_init, handles created by this function will not be destroyed at the end of the PHP request. If a persistent share handle with the same set of share_options is found, it will be reused.
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share_options
A non-empty array of CURL_LOCK_DATA_* constants.
[!NOTE]
CURL_LOCK_DATA_COOKIE is not allowed and, if specified, this function will throw a ValueError. Sharing cookies between PHP requests may lead to inadvertently mixing up sensitive cookies between users.
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Returns a CurlSharePersistentHandle.
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If share_options is empty, this function throws a ValueError.
If share_options contains a value not matching a CURL_LOCK_DATA_*, this function throws a ValueError.
If share_options contains CURL_LOCK_DATA_COOKIE, this function throws a ValueError.
If share_options contains a non-integer value, this function throws a TypeError.
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curl_share_init_persistent example
This example will create a persistent cURL share handle and demonstrate sharing connections between them. If this is executed in a long-lived PHP SAPI, $sh will survive between SAPI requests.
<?php
// Create or retrieve a persistent cURL share handle set to share DNS lookups and connections
$sh = curl_share_init_persistent([CURL_LOCK_DATA_DNS, CURL_LOCK_DATA_CONNECT]);
// Initialize the first cURL handle and assign the share handle to it
$ch1 = curl_init("http://example.com/");
curl_setopt($ch1, CURLOPT_SHARE, $sh);
// Execute the first cURL handle. This may reuse the connection from an earlier SAPI request
curl_exec($ch1);
// Initialize the second cURL handle and assign the share handle to it
$ch2 = curl_init("http://example.com/");
curl_setopt($ch2, CURLOPT_SHARE, $sh);
// Execute the second cURL handle. This will reuse the connection from $ch1
curl_exec($ch2);
?>